A wristwatch and a method for improving security in electronic payment for a wristwatch are provided. The wristwatch includes a short distance communication module having a security element. The security element provides security information required in implementing the electronic payment. The wristwatch further includes a controller coupled to the short distance communication module for enabling or disabling the electronic payment executed by the short distance communication module, based on a user operation. In the wristwatch, the electronic payment function can be manually launched or terminated by a user, thereby reducing a risk of being stolen for security data.