Data transmission time delay measurement and reporting method between access networks and terminal

The present invention discloses a data transmission time delay measurement and reporting method between access networks. A terminal receives time delay measurement and reporting configuration information sent by the first network side; the data transmission time delay measurement between the first network and the second network is performed according to the time delay measurement and the reporting configuration information, and the measurement result is reported to the first network. The present invention further discloses a terminal.