To solve the 3D radar cueing 3D radar of networked radars for detecting targets cooperatively, the successful cueing probability model is built, furthermore the successful cueing probability and the cueing error of 3D radar cueing 3D radar are analyzed and derived. The related parameters' effect on the successful cueing probability at different conditions are discussed and simulated whether the target moves or not. Finally, some related properties of the successful cueing probability are also given. The conclusions presented in this paper will offer some advice for choosing the parameter and collocation of the netted radars and have important reference value for the design the 3D radar to 3D radar guiding and cueing systems.