We propose a double-lens tracking-camera system composed of two lens-modules. One module is to take a wide view while the other is to track and magnify the target with its pan-tilt mechanism, which mimics the eye’s function of tracking and watching an object without losing wide whole view. We have developed a prototype of the camera and applied it two real-worldapplications,i.e.,“fish-tracking”and “illegal-disposal-surveillance” and had excellent results fundamentally in theapplications.