A quality parameter transmission method includes: sending, by the network side device, a first request message to the terminal, where the first request message is used to request a quality parameter related to user experience of a preset service; and after receiving the first request message from the network side device, sending, by the terminal, the quality parameter to the network side device. The network side device obtains, from the terminal, the quality parameter related to user experience of the preset service, and therefore can evaluate network operation quality by using the quality parameter, to facilitate network optimization, provide better network quality for the terminal, and improve user experience.