A wireless communication method, a terminal device and a network device are provided. The terminal device in an idle or de-activated state can carry out cell measurement on the basis of the configuration of the network device. After entering a connected state, the measurement result is reported to assist the network device in configuring an auxiliary cell and/or auxiliary cell group in a CA, and/or, assist in configuring a multi-wireless access technology dual connection. The wireless communication method includes that the terminal device receives first configuration information sent by the network device, the first configuration information being used to indicate the terminal device in an idle state and/or de-activated state to carry out cell measurement and including first measurement information for E-UTRAN and/or second measurement information for NR, and the terminal device carries out cell measurement according to the first configuration information.