[Object] To provide a cell observation information processing system that makes it possible to save, as much as possible, user's operation effort in tag input work and to decrease error rate of tag assignment.
[Measures for solution] The system includes a tag acquiring section 11 that acquires a tag set for searching for observation information acquired in response to an acquisition order at one time point and a storing section that stores into an archive section the observation information upon assigning it the tag set. The tag acquiring section automatically acquires or generates a possible tag set suggested to be assigned to the observation information, accepts a change order by the user to another tag set from the possible tag set, and, if having not received a change order, acquires the possible tag set automatically acquired or generated as the tag set to be assigned without accepting an input of another tag set by the user or, if having received from the user a change order, accepts an input of another tag set by the user and acquires the accepted another tag set as the tag set to be assigned.