diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b68dd303841d8..a0b71fcff02e5 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -747,13 +747,7 @@ publish-rustdoc:
   image:                           node:16
   variables:
     GIT_DEPTH:                     100
-    # --- Following variables are for rustdocs deployment ---
-    # Space separated values of branches and tags to generate rustdocs
-    RUSTDOCS_DEPLOY_REFS:          "master monthly-2021-09+1 monthly-2021-08 v3.0.0"
-    # Location of the docs index template
-    INDEX_TPL:                     ".maintain/docs-index-tpl.ejs"
-    # Where the `/latest` symbolic link links to. One of the $RUSTDOCS_DEPLOY_REFS value.
-    LATEST:                        "monthly-2021-09+1"
+    RUSTDOCS_DEPLOY_REFS:          "master"
   rules:
     - if: $CI_PIPELINE_SOURCE == "pipeline"
       when: never
@@ -783,34 +777,18 @@ publish-rustdoc:
     - git config remote.origin.url "git@github.com:/paritytech/${CI_PROJECT_NAME}.git"
     - git config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*"
     - git fetch origin gh-pages
-    # Install `ejs` and generate index.html based on RUSTDOCS_DEPLOY_REFS
-    - yarn global add ejs
-    - 'ejs ${INDEX_TPL} -i "{\"deploy_refs\":\"${RUSTDOCS_DEPLOY_REFS}\",\"repo_name\":\"${CI_PROJECT_NAME}\",\"latest\":\"${LATEST}\"}" > /tmp/index.html'
     # Save README and docs
     - cp -r ./crate-docs/ /tmp/doc/
     - cp README.md /tmp/doc/
     - git checkout gh-pages
-    # Remove directories no longer necessary, as specified in $RUSTDOCS_DEPLOY_REFS.
-    # Also ensure $RUSTDOCS_DEPLOY_REFS is not just empty spaces.
-    # Even though this block spans multiple lines, they are concatenated to run as a single line
-    #   command, so note for the semi-colons in the inner-most code block.
-    - if [[ ! -z ${RUSTDOCS_DEPLOY_REFS// } ]]; then
-        for FILE in *; do
-          if [[ ! " $RUSTDOCS_DEPLOY_REFS " =~ " $FILE " ]]; then
-            echo "Removing ${FILE}...";
-            rm -rf $FILE;
-          fi
-        done
-      fi
-    # Move the index page & built back
-    - mv -f /tmp/index.html .
+    # Install `index-tpl-crud` and generate index.html based on RUSTDOCS_DEPLOY_REFS
+    - which index-tpl-crud &> /dev/null || yarn global add @jimmychu0807/index-tpl-crud
+    - index-tpl-crud upsert ./index.html ${CI_COMMIT_REF_NAME}
     # Ensure the destination dir doesn't exist.
     - rm -rf ${CI_COMMIT_REF_NAME}
     - mv -f /tmp/doc ${CI_COMMIT_REF_NAME}
-    # Add the symlink
-    - '[[ -e "$LATEST" ]] && ln -sf "${LATEST}" latest'
     # Upload files
-    - git add --all --force
+    - git add --all
     # `git commit` has an exit code of > 0 if there is nothing to commit.
     # This causes GitLab to exit immediately and marks this job failed.
     # We don't want to mark the entire job failed if there's nothing to
diff --git a/.maintain/rustdocs-release.sh b/.maintain/rustdocs-release.sh
new file mode 100755
index 0000000000000..8a250849ee7a6
--- /dev/null
+++ b/.maintain/rustdocs-release.sh
@@ -0,0 +1,244 @@
+#!/usr/bin/env bash
+# set -x
+
+# This script manages the deployment of Substrate rustdocs to https://paritytech.github.io/substrate/.
+# - With `deploy` sub-command, it will checkout the passed-in branch/tag ref, build the rustdocs
+#   locally (this takes some time), update the `index.html` index page, and push it to remote
+#   `gh-pages` branch. So users running this command need to have write access to the remote
+#   `gh-pages` branch. This sub-command depends on [@jimmychu0807/index-tpl-crud](https://www.npmjs.com/package/@jimmychu0807/index-tpl-crud)
+#   to update the DOM of index.html page.
+# - With `remove` sub-command, it will remove the deployed rustdocs from `gh-pages`, and update the
+#   index.html page as necessary. It may remove the `latest` symbolic link.
+#
+# Examples:
+#   # Showing help text
+#   rustdocs-release.sh -h
+#
+#   # Deploy rustdocs of `monthly-2021-10` tag
+#   rustdocs-release.sh deploy monthly-2021-10
+#
+#   # In addition to the above, the `latest` symlink will point to this version of rustdocs
+#   rustdocs-release.sh deploy -l monthly-2021-10
+#
+#   # Remove the rustdocs of `monthly-2021-10` from `gh-pages`.
+#   rustdocs-release.sh remove monthly-2021-10
+#
+# Dependencies:
+#   - @jimmychu0807/index-tpl-crud - https://www.npmjs.com/package/@jimmychu0807/index-tpl-crud
+#
+
+# Script setting
+# The git repo http URL
+REMOTE_REPO="https://github.com/paritytech/substrate.git"
+TMP_PREFIX="/tmp"                             # tmp location that the built doc is copied to.
+DOC_INDEX_PAGE="sc_service/index.html"
+
+# Set to `true` if using cargo `nightly` toolchain to build the doc.
+# Set to `false` to use the default cargo toolchain. This is preferred if you want to build
+# the rustdocs with a pinned nightly version set to your default toolchain.
+CARGO_NIGHTLY=false
+
+# Set the git remote name. Most of the time the default is `origin`.
+GIT_REMOTE="origin"
+LATEST=false
+
+# Setting the help text
+declare -A HELP_TXT
+HELP_TXT["deploy"]=$(cat <<-EOH
+Build and deploy the rustdocs of the specified branch/tag to \`gh-pages\` branch.
+
+  usage:      $0 deploy [-l] <git_branch_ref>
+  example:    $0 deploy -l monthly-2021-10
+
+  options:
+    -l        The \`latest\` path will be sym'linked to this rustdocs version
+EOH
+)
+
+HELP_TXT["remove"]=$(cat <<-EOH
+Remove the rustdocs of the specified version from \`gh-pages\` branch.
+
+  usage:      $0 remove <git_branch_ref>
+  example:    $0 remove monthly-2021-10
+EOH
+)
+
+set_and_check_rustdoc_ref() {
+  [[ -z "$1" ]] && {
+    echo -e "git branch_ref is not specified.\n"
+    echo "${HELP_TXT[$2]}"
+    exit 1
+  }
+  BUILD_RUSTDOC_REF=$1
+}
+
+check_local_change() {
+  # Check there is no local changes before proceeding
+  [[ -n $(git status --porcelain) ]] \
+    && echo "Local changes exist, please either discard or commit them as this command will change the current checkout branch." \
+    && exit 1
+}
+
+build_rustdocs() {
+  # Build the docs
+  time cargo $($CARGO_NIGHTLY && echo "+nightly") doc --workspace --all-features --verbose \
+    || { echo "Generate $1 rustdocs failed" && exit 1; }
+  rm -f target/doc/.lock
+
+  # Moving the built doc to the tmp location
+  mv target/doc "${2}"
+  [[ -n "${DOC_INDEX_PAGE}" ]] \
+    && echo "<meta http-equiv=refresh content=0;url=${DOC_INDEX_PAGE}>" > "${2}/index.html"
+}
+
+upsert_index_page() {
+  # Check if `index-tpl-crud` exists
+  which index-tpl-crud &> /dev/null || yarn global add @jimmychu0807/index-tpl-crud
+  index-tpl-crud upsert $($1 && echo "-l") ./index.html "$2"
+}
+
+rm_index_page() {
+  which index-tpl-crud &> /dev/null || yarn global add @jimmychu0807/index-tpl-crud
+  index-tpl-crud rm ./index.html "$1"
+}
+
+git_add_commit_push() {
+  git add --all
+  git commit -m "$1" || echo "Nothing to commit"
+  git push "${GIT_REMOTE}" gh-pages --force
+}
+
+import_gh_key() {
+  [[ -n $GITHUB_SSH_PRIV_KEY ]] && {
+    eval $(ssh-agent)
+    ssh-add - <<< $GITHUB_SSH_PRIV_KEY
+  }
+
+  # Adding github.com as known_hosts
+  ssh-keygen -F github.com &>/dev/null || {
+    [[ -e ~/.ssh ]] || mkdir ~/.ssh
+    [[ -e ~/.ssh/known_hosts ]] || touch ~/.ssh/known_hosts
+    ssh-keyscan -t rsa github.com >> ~/.ssh/known_hosts
+  }
+}
+
+deploy_main() {
+  check_local_change
+  import_gh_key
+
+  CURRENT_GIT_BRANCH=$(git rev-parse --abbrev-ref HEAD)
+  TMP_PROJECT_PATH="${TMP_PREFIX}/${PROJECT_NAME}"
+  DOC_PATH="${TMP_PROJECT_PATH}/${BUILD_RUSTDOC_REF}"
+
+  # Build the tmp project path
+  rm -rf "${TMP_PROJECT_PATH}" && mkdir "${TMP_PROJECT_PATH}"
+
+  # Copy .gitignore file to tmp
+  [[ -e "${PROJECT_PATH}/.gitignore" ]] && cp "${PROJECT_PATH}/.gitignore" "${TMP_PROJECT_PATH}"
+
+  git fetch --all
+  git checkout -f ${BUILD_RUSTDOC_REF} || { echo "Checkout \`${BUILD_RUSTDOC_REF}\` error." && exit 1; }
+  build_rustdocs "${BUILD_RUSTDOC_REF}" "${DOC_PATH}"
+
+  # git checkout `gh-pages` branch
+  git fetch "${GIT_REMOTE}" gh-pages
+  git checkout gh-pages
+  # Move the built back
+  [[ -e "${TMP_PROJECT_PATH}/.gitignore" ]] && cp -f "${TMP_PROJECT_PATH}/.gitignore" .
+  # Ensure the destination dir doesn't exist under current path.
+  rm -rf "${BUILD_RUSTDOC_REF}"
+  mv -f "${DOC_PATH}" "${BUILD_RUSTDOC_REF}"
+
+  upsert_index_page $LATEST "${BUILD_RUSTDOC_REF}"
+  # Add the latest symlink
+  $LATEST && rm -rf latest && ln -sf "${BUILD_RUSTDOC_REF}" latest
+
+  git_add_commit_push "___Deployed rustdocs of ${BUILD_RUSTDOC_REF}___"
+  # Clean up
+  # Remove the tmp asset created
+  rm -rf "${TMP_PROJECT_PATH}"
+  # Resume back previous checkout branch.
+  git checkout -f "$CURRENT_GIT_BRANCH"
+}
+
+remove_main() {
+  check_local_change
+  import_gh_key
+
+  CURRENT_GIT_BRANCH=$(git rev-parse --abbrev-ref HEAD)
+
+  # git checkout `gh-pages` branch
+  git fetch "${GIT_REMOTE}" gh-pages
+  git checkout gh-pages
+
+  rm -rf "${BUILD_RUSTDOC_REF}"
+  rm_index_page "${BUILD_RUSTDOC_REF}"
+  # check if the destination of `latest` exists and rmove if not.
+  [[ -e "latest" ]] || rm latest
+
+  git_add_commit_push "___Removed rustdocs of ${BUILD_RUSTDOC_REF}___"
+
+  # Resume back previous checkout branch.
+  git checkout -f "$CURRENT_GIT_BRANCH"
+}
+
+# ---- The script execution entry point starts here ----
+
+# Arguments handling
+SUBCMD=$1
+[[ $SUBCMD == "deploy" || $SUBCMD == "remove" ]] \
+  || { echo "Please specify a subcommand of \`deploy\` or \`remove\`" && exit 1 ;}
+shift
+
+# After removing the subcommand, there could only be 1 or 2 parameters afterward
+[[ $# -lt 1 || $# -gt 2 ]] && {
+  echo "${HELP_TXT[${SUBCMD}]}"
+  exit 1
+}
+
+# Parsing options and argument for `deploy` subcommand
+[[ $SUBCMD == "deploy" ]] && {
+  while getopts :lh opt; do
+    case $opt in
+      l)
+        LATEST=true
+        ;;
+      h)
+        echo "${HELP_TXT[$SUBCMD]}"
+        exit 0
+        ;;
+      \?)
+        echo "Invalid option: -$OPTARG" >&2
+        exit 1
+        ;;
+    esac
+  done
+}
+# Parsing options and argument for `remove` subcommand
+[[ $SUBCMD == "remove" ]] && {
+  while getopts :h opt; do
+    case $opt in
+      h)
+        echo "${HELP_TXT[$SUBCMD]}"
+        exit 0
+        ;;
+      \?)
+        echo "Invalid option: -$OPTARG" >&2
+        exit 1
+        ;;
+    esac
+  done
+}
+
+shift $(($OPTIND - 1))
+set_and_check_rustdoc_ref ${1:-''} $SUBCMD
+
+SCRIPT=$(realpath $0)
+SCRIPT_PATH=$(dirname $SCRIPT)
+PROJECT_PATH=$(dirname ${SCRIPT_PATH})
+PROJECT_NAME=$(basename "$PROJECT_PATH")
+
+pushd "${PROJECT_PATH}" &>/dev/null
+[[ $SUBCMD == "deploy" ]] && deploy_main
+[[ $SUBCMD == "remove" ]] && remove_main
+popd &>/dev/null
diff --git a/docs/rustdocs-release.md b/docs/rustdocs-release.md
new file mode 100644
index 0000000000000..5c7e2db40a2cd
--- /dev/null
+++ b/docs/rustdocs-release.md
@@ -0,0 +1,20 @@
+# Rustdocs Release Process
+
+There is [a script in place](../.maintain/rustdocs-release.sh) to manage the deployment of Substrate rustdocs at
+https://paritytech.github.io/substrate, which is pushing the rustdocs file in `gh-pages` branch of
+https://github.com/paritytech/substrate.
+
+The documentation at the top of the `rustdocs-release.sh` explains most of the mechanics of the script.
+
+Manage the rustdocs deployment with one of the following commands.
+
+```bash
+# Deploy rustdocs of `monthly-2021-10` tag
+.maintain/rustdocs-release.sh deploy monthly-2021-10
+
+# In addition to the above, the `latest` symlink will point to this version of rustdocs
+.maintain/rustdocs-release.sh deploy -l monthly-2021-10
+
+# Remove the rustdocs of `monthly-2021-10` from `gh-pages`.
+.maintain/rustdocs-release.sh remove monthly-2021-10
+```