The invention provides a method, equipment and a system for controlling a slot time. The method for controlling the slot time comprises steps: determining a time span of a carrier frequency slot time of a multi-carrier module from a dormant mode to an available mode through a base station; and controlling the carrier frequency slot time of the multi-carrier module and the carrier slot time of the multi-carrier module through the base station according to the time span and the slot time occupation information of the multi-carrier module. The method of the embodiment of the invention can be adopted to solve a radio frequency index deterioration problem of the multi-carrier module when the base station dynamically turns off the available carrier frequency slot time of the multi-carrier module in an activated state.