Cap rotation device

A cap rotation device, comprising:

• a cap rotator;
• a liquid transferring device disposed near the cap rotator;
• an optical detecting device disposed between the cap rotator and the liquid transferring device, wherein the optical detecting device detects a position of a sealing cap of a chemical drum to guide the cap rotator aligning with the sealing cap, the cap rotator opens the sealing cap and the liquid transferring device transfers a chemical liquid;
• a fixing plate;
• two vertical moving devices respectively connected between the fixing plate and the cap rotator, and the fixing plate and the liquid transferring device to vertically move the cap rotator and the liquid transferring device respectively;
• and
• two horizontal moving devices connected to the fixing plate to horizontally move the fixing plate.