PURPOSE: To reduce bucket take out manhours for confirming the number of parts in the bucket, by confirming the number of parts in the bucket simultaneously with taking out the bucket during delivery work.

CONSTITUTION: A condition on the number of parts in a bucket is entered by an in-bucket stock confirmation condition input unit 2 when parts are taken out from a warehouse. Then, when the bucket is taken out during delivery work, the number of parts in a delivery bucket after the delivery is calculated by a stock quantity arithmetic unit 3 by reducing the number of parts to be delivered from the data of the number of parts in the bucket registered in a file 8, and it is judged by a stock confirmation executing condition judging unit 4 whether the number of parts after the delivery agrees with the number of parts which is set up by the in-bucket stock confirmation condition input unit 2. If the number of parts after the delivery agrees with the set up condition, a command for confirming the number of stocks in the bucket is given by an in-bucket stock confirmation command unit 5 in synchronization with taking out the bucket, and the result of counting is entered by a count result input unit 6 and registered in the file 8 by an in-bucket number of data parts register unit 7.