To realize the all NO-DIG (trenchless method) operation of conduit installation, NTT developed the microtunneling method ?ACEMOLE? allowing long-distance and curved installations and promoted use of this method. NO-DIG method is not widespread in construction works because its construction cost is not economically compared with opencut method. We developed new ACEMOLE to solve these problems drastically and realize NO-DIG entirely. Especially position-detection system using fiber-optic gyroscope and intelligent driving control system using optimum control theory make possible to control microtunneling machines accurately without operators skills and to disseminate NO-DIG technology smoothly.