Embodiments of the present application relate to the technical field of radio communication, and particularly to a method, system, and device for working on a TDD cell for enabling a UE to work on an asymmetric TDD cell. According to the embodiments of the present application, the method comprises: A network side device determining uplink parameter information of the asymmetric TDD cell; and the network side device putting the uplink parameter information into system information and sending the system information to a terminal to instruct the terminal to work on the corresponding asymmetric TDD cell according to the system information. In the embodiments of the present application, the uplink parameter information is added to the system information so that the terminal can work on the asymmetric TDD cell according to the system information, thereby improving the efficiency of the terminal.