The present invention discloses a service processing method and apparatus, and relates to the communications field. The method includes: receiving trigger information sent by an intermediary device; and assisting, based on the trigger information, the intermediary device in negotiating with UE and a network server, to enable the intermediary device to obtain a first key, where the first key is used by the intermediary device to decrypt ciphertexts sent by the UE and the network server, the ciphertext is obtained after the UE or the network server encrypts service information by using a second key, and the first key is corresponding to the second key. The present invention resolves a problem that an intermediary device cannot provide service optimization for user equipment and a network server because the intermediary device cannot decrypt ciphertext, and achieves an effect of expanding a usage scope of service optimization.