PURPOSE: To control the feed in and out of a container filled with an object to be heated or to automate feed in and out work by operating the feed in and out by operating the feed in an out start times from the use scheduled time of the object to be heated set by a setting means and the heating time stored in a memory means by an operation means and transmitting the same from a control means to a feed in and out means.

CONSTITUTION: Feed in and out means 60-62 for feeding in and out a container 13 filled with an object to be heated with respect to a rack 50 and a dry dissolving apparatus 1 are provided. Feed in and out start times are operated from the use scheduled time of the object to be heated set by a setting means 40 and the heating time stored in a memory means 33 by an operation means 30. At the feed in and out start time, the start signals of the feed-out of the object to be heated from the rack 50 and the feed-in thereof to the apparatus 1 are transmitted to the feed in and out means 60-62 from a control means 30. Further, the feed-out signal from the dry dissolving apparatus 1 of the object to be heated is transmitted to the feed in and out means 60-62 from the control means 30 on the basis of the elapse of the stored heating time. As a result, the feed in and out control or feed in and out work of the container is automatically performed.