Login method and login system of mobile terminal

The invention provides a login method and a login system of a mobile terminal. The login method comprises interconnection login steps which are to judge if the interconnection state of a mobile terminal and a server-side is accessible, the mobile terminal logins to through mode 1 and accesses to the server-side and offline login steps which are to judge if the interconnection state of the mobile terminal and the server-side is not accessible, the mobile terminal logins to a local mobile terminal through mode 2 and accesses to the data of the local mobile terminal after authenticating. The login method and login system of the mobile terminal ensure user to login to the local client-side to access to important data under the condition that the mobile terminal and the server-side are not in a normal interconnection state by adding the mode of offline login, besides interconnection login, thereby not only interconnection times are reduced, online time is shortened but the login method and system is convenient for users to use.