To provide a rational dental treatment information system which enables dentists and patients to mutually obtain consultation information on dental consultation and reserve consultation.

The dental consultation information system 100 associatively process consultation information on many patients provided from terminals 21 of many dental clinics 20 through a terminal 31 of a specific information data management office 30 by using a communication network 11. A patient terminal 51 and a public search institution terminal 41 can also be connected. Specific consultation information data can be specified and received from the management office terminal 31 by using the patient ID code, dentist IC code, etc. Information of three-dimensional image processing provided for the information data management office 30 is usable. Even an introduced doctor and a remote clinic are able to eliminate an incorrect diagnosis by obtaining correct dental consultation information from the management office terminal 31 without carrying a clinical record nor a X-rays photograph. The technique of the dentist can be improved by the obtained materials. A consultation reservation can be applied for, changed, and canceled through the patient terminal 61 and clinic terminal 21. An object person can be searched for from the public search institution terminal 41 by specifying the tooth mark.