Disclosed are an information sending and receiving method and device, a terminal, and a base station, used for solving the technical problem of the existing low data transmission performance. The information sending method comprises: the base station determines energy-saving configuration information of the terminal; the base station determines PDCCH detection window information; the base station sends PDCCH detection indication information to the terminal according to the PDCCH detection window information on the basis of the energy-saving configuration information of the terminal.