The invention provides a movement simulating device and method of an unmanned submersible vehicle. The simulating device comprises two displays, a serve and a control panel, wherein one display displays the 2D movement state and operation interface of the unmanned submersible vehicle, the other display displays the 3D movement state of the unmanned submersible vehicle, the included angle between the displays is 100 to 110 degree, the displays are connected to the server via video lines, the control panel is connected with the server via an isolated signal plate, and the server is connected with the network via a network interface. Influence of fault and water tank operation is considered in bearing of a movement model of the unmanned submersible vehicle, so that movement of the unmanned submersible vehicle is simulated in a full-state manner. The movement resolution process of the unmanned submersible vehicle mainly comprises resolution of basic bearing, resolution of fault bearing, resolution of water tank operation bearing and comprehensive processing. According to the device and method, the stability is high, the transplantability is high, operation is simple, movement of the unmanned submersible device in the normal state and the fault state is simulated, and a basic platform is provided for researches on the maneuverability and unsinkability of the unmanned submersible vehicle.