An image information retrieving device comprises: a primary service control information storing section in which primary service control information is stored in advance; a response section which performs between a facsimile terminal which is connected to a line, output of guidance information in accordance with a service control procedure indicated by primary service control information stored in the primary service control information storing section, input of an assignment signal from a user based on the guidance information, and output of image information as a retrieval result based on the assignment signal; a retrieval processing section which retrieves image information from an image information storing device in response to the operation of the response section, reads the image information as the retrieval result, and outputs the image information to the response section; a secondary service control information storing section for storing temporarily secondary service control information showing a service control procedure which is stored together with the image information in the image information storing device and following on from the service control procedure shown by the primary service control information stored in the primary service control information storing section; and a control section in the response section, which directs the retrieval processing section to read the secondary service control information from the image information storing device and store this in the secondary service control information storing section at the time of input of the assignment signal, and performs control for outputting the guidance information to the facsimile terminal in accordance with the service control procedure indicated by the stored secondary service control information.