diff --git a/action.yml b/action.yml
index a3e8f54..5aa2617 100644
--- a/action.yml
+++ b/action.yml
@@ -5,22 +5,42 @@ branding:
   icon: 'database'
   color: 'orange'
 inputs:
-  # See https://hub.docker.com/_/mysql for supported versions and further details on input environment variables
+  host port:
+    description: 'The port of host'
+    required: false
+    default: 3306
+  container port:
+    description: 'The port of container'
+    required: false
+    default: 3306
+  character set server:
+    description: '--character-set-server - The character set of MySQL server'
+    required: false
+    default: 'utf8mb4'
+  collation server:
+    description: '--collation-server - The character collation of MySQL server'
+    required: false
+    default: 'utf8mb4_general_ci'
   mysql version:
     description: 'Version of MySQL to use'
     required: false
     default: 'latest'
+  mysql root password:
+    description: 'MYSQL_ROOT_PASSWORD - root superuser password'
+    required: false
+    default: ''
   mysql database:
     description: 'MYSQL_DATABASE - name for the default database that is created'
     required: false
-    default: 'test'
+    default: ''
   mysql user:
     description: 'MYSQL_USER - create the specified user with superuser power for created database'
     required: false
-    default: 'test'
+    default: ''
   mysql password:
-    description: 'MYSQL_PASSWORD - superuser password'
-    required: true
+    description: 'MYSQL_PASSWORD - specified superuser password which user is power for created database'
+    required: false
+    default: ''
 runs:
   using: 'docker'
   image: 'Dockerfile'
diff --git a/entrypoint.sh b/entrypoint.sh
index a3cda84..bc1d184 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,9 +1,32 @@
 #!/bin/sh
 
-docker_run="docker run -e MYSQL_RANDOM_ROOT_PASSWORD=true"
-docker_run="$docker_run -e MYSQL_DATABASE=$INPUT_MYSQL_DATABASE"
-docker_run="$docker_run -e MYSQL_USER=$INPUT_MYSQL_USER"
-docker_run="$docker_run -e MYSQL_PASSWORD=$INPUT_MYSQL_PASSWORD"
-docker_run="$docker_run -d -p 3306:3306 mysql:$INPUT_MYSQL_VERSION"
+docker_run="docker run"
+
+if [ -n "$INPUT_MYSQL_ROOT_PASSWORD" ]; then
+  echo "Root password not empty, use root superuser"
+
+  docker_run="$docker_run -e MYSQL_ROOT_PASSWORD=$INPUT_MYSQL_ROOT_PASSWORD"
+elif [ -n "$INPUT_MYSQL_USER" ]; then
+  if [ -z "$INPUT_MYSQL_PASSWORD" ]; then
+    echo "The mysql password must not be empty when mysql user exists"
+    exit 1
+  fi
+
+  echo "Use specified user and password"
+
+  docker_run="$docker_run -e MYSQL_RANDOM_ROOT_PASSWORD=true -e MYSQL_USER=$INPUT_MYSQL_USER -e MYSQL_PASSWORD=$INPUT_MYSQL_PASSWORD"
+else
+  echo "Both root password and superuser are empty, must contains one superuser"
+  exit 1
+fi
+
+if [ -n "$INPUT_MYSQL_DATABASE" ]; then
+  echo "Use specified database"
+
+  docker_run="$docker_run -e MYSQL_DATABASE=$INPUT_MYSQL_DATABASE"
+fi
+
+docker_run="$docker_run -d -p $INPUT_HOST_PORT:$INPUT_CONTAINER_PORT mysql:$INPUT_MYSQL_VERSION --port=$INPUT_CONTAINER_PORT"
+docker_run="$docker_run --character-set-server=$INPUT_CHARACTER_SET_SERVER --collation-server=$INPUT_COLLATION_SERVER"
 
 sh -c "$docker_run"