In order to meeting a series of requirements of equipment support capability under the new situation, a 3D analytical model based on WSR methodology for equipment support capability assessment is established. Combining “physics”, “affairs” and “humanities”, we can understand the composition of equipment capability, follow the process and the personnel involved, integrate the various needs, and rank the importance of the goal, put forward a set of related strategies to improve the equipment support assessment needs. This model can be used as a reference for further research on equipment support capability.