The invention provides a method supplying service to a terminal, a network side device and the terminal. The method includes that a network side obtains current state information of the terminal, and the state information comprises the terminal and/or a working state which is applied in the terminal; the network side determines a service strategy corresponding to the current state information of the terminal according to a corresponding relation between the predetermined state information of the terminal and the applied service strategy; and the network supplies service to the terminal according to the determined service strategy. According to the method supplying the service to the terminal, the network side device and the terminal, the needed service which is supplied to a user in a targeted mode can be achieved.