A method, a device, and a system for transmitting Packet Switched (PS) services are provided. The method includes: receiving an Activate Packet Data Protocol (PDP) Context Request message of PS services sent by a User Equipment (UE), in which the Activate PDP Context Request message carries an Access Point Name (APN) for identifying a first service network or a second service network (s201); establishing a corresponding transmission channel according to the APN (s202); and transmitting the PS services to the corresponding service network through the established transmission channel (s203). Through the method and the device, different networks are selected to transmit the PS services according to the APN for identifying different networks in the Activate PDP Context Request message of PS services sent from the UE, thereby implementing distribution of the PS services.