PURPOSE: To reduce a shock at storage time and to promptly perform storage by lowering a bucket to its predetermined height at a normal speed, thereafter to detection of the floor arrival at a slow speed, and stopping the bucket by detecting the floor arrival, when an overhead crane with bucket is stored in an automatic storage functioning overhead crane with bucket.

CONSTITUTION: In the case of automatically guiding an overhead crane with bucket to a storage position in a pit by a command of a crane driving means 31, height from a floor arrival surface of the bucket is supervised by a bucket driving means 32 to the bucket at a normal lowering speed till the bucket reaches predetermined height, for instance, 300mm After reaching the predetermined height, the bucket is lowered at a sufficiently slow speed, for instance, 1/10 of the normal speed. When floor arrival is detected by a floor arrival detecting means 33, the bucket driving means 32 stops the bucket to be lowed down by a signal of the floor arrival detecting means 33.