This invention relates to oil and gas exploration and development areas, especially bottom hole data acquisition and processing methods, equipment and systems used in under balanced drilling holes. The system can applies to bottom hole data acquisition of all kinds of under balanced drilling holes; the system can accurately timely collect, save and playback on the ground the bottom pressure, temperature, pressure per stone and torque parameters. With software and hardware openness, can continuously upgrade and improved; easy installation of the system and easy to use.