The invention provides a method and a system of applying jump. The method comprises that a source application performs identity authentication on a target application; if the authentication of the target application is valid, the source application creates a jump request and sends the jump request to the target application; the target application receives the jump request and carries out identity authentication on the source application; and if the authentication of the source application is valid, the target application responds to the received jump request and returns a response result to the source application. According to the invention, the problems such as data leakage and illegal calls are solved by the identity authentication between the source application and the target application.