At present, anti-sniper EO detection includes two methods mainly, IR detection and laser detection. Taking U.S.A., France, Israel and Russia for examples, the developments of anti-sniper IR and laser detection technology and equipment are introduced. From the advancement of EO detection materials, integration of detections and countermeasures, expansion of installation platform，fusion of multifunction, realization of network capability, the trends of anti-sniper EO detection technology and equipment are discussed lastly.