Ever since the first picture was made in 1826 which was B/W film. Now in the beginning of 1990’s, more than 95 color films are well involved in our life. However, the authentic beauty of B/W photography is still remained at the bottom of our heart.It is the basic motivation to research B/W film.In fact, no matter how brilliantly the color film is, the B/W film is found vividly not only in general purpose but in scientific, medical, and intellengent fields with impeccable witness of human development which enriches our ultimate imagination.The main topics are: 1. Discover the latest technology improvement of B/W film. 2. Analyze the application of B/W film. 3. Compare all kind of developers technology.