An incubator input unit receives from a user: a first input which selects a specific culture vessel for which an observation schedule is to be registered; and a second input which specifies an imaging condition of a specific culture vessel in the observation sequence. According to the imaging condition, a calculation unit calculates a time required for observation of the specific culture vessel by using first data on the culture vessel convey time and second data on the time required for an imaging operation. According to the schedule data, the schedule management unit extracts a registration-enabled time band during which the specific culture vessel observation sequence can be executed without being overlapped with an observation schedule already registered and performs display/output for presentation of the registration-enabled time band to a user.