This paper deals with an automatic observation system with regard to the 34 present weather phenomena. The system works with techniques of photographing and optical scattering as well as the present surface observation system. The automated present weather observing system consists of two parts. One is a present weather sensor, and the other is a digital processor. The present weather sensor collects photographs and optical scattering information. The digital processor, however, processes the photographs, and determines the present weather type with helps of the surface observation system. Achievements were made in realizing the surface coagulation phenomenon by photographing technology.