To make throughly continuous the all manufacturing processes of photographic emulsion, a system was necessary; in which one tank, multi stage tower, ion exchange membrane cell and pipe were combined together. There were nine ways of combinations. By one system, in which those apparatuses were combined in one way, experiments were performed. Raw material solutions were emulsified in a tank, 1st ripening was performed in a pipe, emulsion was mixed with gelatin in a tank, it was desalted in an ion exchange membrane cell, 2nd ripening was performed in a pipe and emulsion was mixed with additions in a tank. By this system, the manufacturing time was shortened by about 20 hours, the characteristic flactuation of emulsion was diminished and possibility of remotecontrol of process in a dark room was brought. This system was adequate for few kind and large quantity, but not for many kind and small quantity.