A wireless communication terminal having a function for dynamically upgrading a platform and a method thereof is disclosed. The wireless communication terminal includes: a first storing unit for storing an application program interface (API) source; a second storing unit for an API identification correspondently mapped to each of application program interfaces stored in the first storing unit; and a controlling unit for using the application program interface stored in the first storing unit by calling the application program interface based on the API identification and dynamically upgrading mapping information between the first storing unit and the second storing unit according to an API upgrade request signal received from exterior.