In this research, a prototype of fire fighting robot is built, the main duty of the robot is to track rooms in building without crushing wall, detect rooms and enter them. The authors try to build a robot based on the stadard that had been decided, including the field (expert division) to simulate it. The research uses the existing body of robbot and AT89S52 as the microcontroller. The focus of the research is on sensors which are expected to function well based on the situation and condition. In this study, the robot uses an ultrasonic sensor that consist of transmitter and receiver so that robot can anticipate the wall it faces. The robot also uses an infrared sensor which has a similiar method as the ultrasonic sensor. The sensor usually used for detection of white line that represents door at every room. All system are controlle by microcontroller AT89S52 and for the programming the system uses the assembly language. Keywords: Robotic,Tracking, Sensor, AT89S52, Assemly