An expert system, named iDoctor, which is used for diagnosing patients andgive outsuggestion how to do test and even give out prescription for healing disease.It hascellphone/computer as main operating interface and series testing Peripherals.It aimed to savemoney for people living in underdeveloped countries and time for developedcountries. In shortterm, it could help doctor to work and for long run, it could take the regulardoctors' work.