The force and motion response of the immersed tube tunnel element aren important parameters of immersed tunnel construction. The immersed tube tunnel element that deposit, float and sink to the sea bed is the world’s longest and widest immersed tunnel. We can’t calculate it accurately using the computational structural mechanics and the computational fluid dynamic. In order to study the hydrodynamic behaviors of element during its construction, we carry out a scaled model test to investigate the motion responses of the tunnel element in the immersion under wave and obtain current actions and tensions acting on the controlling cables of its immersing system based on the similarity theory, which may serve as a basis for the key parameters in the numerical simulation analysis, and a guidance to the construction of the immersed tunnel.