A method for cross-system network information interaction, and a network element of a terminal system network, and the method includes: receiving, by a terminal, a request message for acquiring history information of the terminal, transmitted by a network element of a specified system network, after the terminal successfully establishes a connection with the system network or the terminal transmits a connection establishment success message or reestablishment success message to the system network; transmitting, by the terminal, history record information of the terminal staying in all the system networks, other system networks except the system network, or a specified system network, to a network element of the system network. In the embodiments of the present document, based on a definition of history record information of the terminal in the WLAN system, a cross-system interaction of the history record information of the terminal in 3GPP-WLAN system may be realized.