The present disclosure discloses a method and system for inputting information in mobile terminal as well as terminal. The method includes: the mobile terminal sending a request (101) for acquiring listening list to a server; the mobile terminal receiving user information in the listening list returned by the server; the mobile terminal receiving and storing the user information, matching a character input by a user with the user information, displaying a matching result, and determining input information (103) according to selection of the user. By applying the present disclosure, the traffic of mobile communication can be saved and the success rate of information transmission can be increased.