Abstract:Based on the basic detection theory and focused on the target detection, the main philosophical attributes, the general engineering properties and the specialties of the modern target detection are discussed. In accordance with the system theoretical viewpoint, the systematic concept of the target detection is expounded and a general target detecting equation is set up. Taken three typical target- detecting systems as an example separately, which includes Doppler radio detector, laser detector and capacitance detector, their application analyses are made