diff --git a/apps/emqx_authz/src/emqx_authz.erl b/apps/emqx_authz/src/emqx_authz.erl
index d8aa4e859..ab49eb894 100644
--- a/apps/emqx_authz/src/emqx_authz.erl
+++ b/apps/emqx_authz/src/emqx_authz.erl
@@ -204,13 +204,13 @@ init_source(#{type := file,
                 {ok, Terms} ->
                     [emqx_authz_rule:compile(Term) || Term <- Terms];
                 {error, eacces} ->
-                    ?LOG(alert, "Insufficient permissions to read the ~ts file", [Path]),
+                    ?SLOG(alert, #{msg => "insufficient_permissions_to_read_file", path => Path}),
                     error(eaccess);
                 {error, enoent} ->
-                    ?LOG(alert, "The ~ts file does not exist", [Path]),
+                    ?SLOG(alert, #{msg => "file_does_not_exist", path => Path}),
                     error(enoent);
                 {error, Reason} ->
-                    ?LOG(alert, "Failed to read ~ts: ~p", [Path, Reason]),
+                    ?SLOG(alert, #{msg => "failed_to_read_file", path => Path, reason => Reason}),
                     error(Reason)
             end,
     Source#{annotations => #{rules => Rules}};
@@ -258,15 +258,15 @@ authorize(#{username := Username,
            } = Client, PubSub, Topic, DefaultResult, Sources) ->
     case do_authorize(Client, PubSub, Topic, Sources) of
         {matched, allow} ->
-            ?LOG(info, "Client succeeded authorization: Username: ~p, IP: ~p, Topic: ~p, Permission: allow", [Username, IpAddress, Topic]),
+            ?SLOG(info, #{msg => "authorization_permission_allowed", username => Username, ipaddr => IpAddress, topic => Topic}),
             emqx_metrics:inc(?AUTHZ_METRICS(allow)),
             {stop, allow};
         {matched, deny} ->
-            ?LOG(info, "Client failed authorization: Username: ~p, IP: ~p, Topic: ~p, Permission: deny", [Username, IpAddress, Topic]),
+            ?SLOG(info, #{msg => "authorization_permission_denied", username => Username, ipaddr => IpAddress, topic => Topic}),
             emqx_metrics:inc(?AUTHZ_METRICS(deny)),
             {stop, deny};
         nomatch ->
-            ?LOG(info, "Client failed authorization: Username: ~p, IP: ~p, Topic: ~p, Reasion: ~p", [Username, IpAddress, Topic, "no-match rule"]),
+            ?SLOG(info, #{msg => "authorization_failed_nomatch", username => Username, ipaddr => IpAddress, topic => Topic, reason => "no-match rule"}),
             {stop, DefaultResult}
     end.
 
diff --git a/apps/emqx_authz/src/emqx_authz_api_sources.erl b/apps/emqx_authz/src/emqx_authz_api_sources.erl
index 9c703209a..a349a1314 100644
--- a/apps/emqx_authz/src/emqx_authz_api_sources.erl
+++ b/apps/emqx_authz/src/emqx_authz_api_sources.erl
@@ -492,7 +492,7 @@ do_write_file(Filename, Bytes) ->
     case file:write_file(Filename, Bytes) of
        ok -> {ok, iolist_to_binary(Filename)};
        {error, Reason} ->
-           ?LOG(error, "Write File ~p Error: ~p", [Filename, Reason]),
+           ?SLOG(error, #{filename => Filename, msg => "write_file_error", reason => Reason}),
            error(Reason)
     end.
 
diff --git a/apps/emqx_authz/src/emqx_authz_mongodb.erl b/apps/emqx_authz/src/emqx_authz_mongodb.erl
index ca65e6f53..c599ba5ad 100644
--- a/apps/emqx_authz/src/emqx_authz_mongodb.erl
+++ b/apps/emqx_authz/src/emqx_authz_mongodb.erl
@@ -40,7 +40,7 @@ authorize(Client, PubSub, Topic,
              }) ->
     case emqx_resource:query(ResourceID, {find, Collection, replvar(Selector, Client), #{}}) of
         {error, Reason} ->
-            ?LOG(error, "[AuthZ] Query mongo error: ~p", [Reason]),
+            ?SLOG(error, #{msg => "query_mongo_error", reason => Reason, resource_id => ResourceID}),
             nomatch;
         [] -> nomatch;
         Rows ->
diff --git a/apps/emqx_authz/src/emqx_authz_mysql.erl b/apps/emqx_authz/src/emqx_authz_mysql.erl
index 6ad206d90..6a5845db7 100644
--- a/apps/emqx_authz/src/emqx_authz_mysql.erl
+++ b/apps/emqx_authz/src/emqx_authz_mysql.erl
@@ -55,7 +55,7 @@ authorize(Client, PubSub, Topic,
         {ok, Columns, Rows} ->
             do_authorize(Client, PubSub, Topic, Columns, Rows);
         {error, Reason} ->
-            ?LOG(error, "[AuthZ] Query mysql error: ~p~n", [Reason]),
+            ?SLOG(error, #{msg => "query_mysql_error", reason => Reason, resource_id => ResourceID}),
             nomatch
     end.
 
diff --git a/apps/emqx_authz/src/emqx_authz_postgresql.erl b/apps/emqx_authz/src/emqx_authz_postgresql.erl
index ead2d985d..2b74eb56e 100644
--- a/apps/emqx_authz/src/emqx_authz_postgresql.erl
+++ b/apps/emqx_authz/src/emqx_authz_postgresql.erl
@@ -59,7 +59,7 @@ authorize(Client, PubSub, Topic,
         {ok, Columns, Rows} ->
             do_authorize(Client, PubSub, Topic, Columns, Rows);
         {error, Reason} ->
-            ?LOG(error, "[AuthZ] Query postgresql error: ~p~n", [Reason]),
+            ?SLOG(error, #{msg => "query_postgresql_error", reason => Reason, resource_id => ResourceID}),
             nomatch
     end.
 
diff --git a/apps/emqx_authz/src/emqx_authz_redis.erl b/apps/emqx_authz/src/emqx_authz_redis.erl
index 3ac7d7e3f..44c1f6f41 100644
--- a/apps/emqx_authz/src/emqx_authz_redis.erl
+++ b/apps/emqx_authz/src/emqx_authz_redis.erl
@@ -43,7 +43,7 @@ authorize(Client, PubSub, Topic,
         {ok, Rows} ->
             do_authorize(Client, PubSub, Topic, Rows);
         {error, Reason} ->
-            ?LOG(error, "[AuthZ] Query redis error: ~p", [Reason]),
+            ?SLOG(error, #{msg => "query_redis_error", reason => Reason, resource_id => ResourceID}),
             nomatch
     end.