This paper presents a study of performances on anautomatic wireless robot using IEEE 802.11g standard andinfrared sensors. The robot acts a personal computer (PC)controlling equipments (e.g. motors) through a printer port.Window XP is setup on the PC robot which is received acommand from notebook (only Start / Stop commands) linkedthrough the use of a wireless router and a real-time streamingprotocol (RTSP) program. The study of performances on theautomatic wireless robot is tested in three patterns of obstaclesi.e.   and Π. In the results, the robot can avoid a hindrancewhen infrared sensors detect the obstacles, then it will movebackward direction in the length of 60 cm and move forwarddirection in the angle of 45º. The sensors can detect colors (exceptblack color) and opaque but they cannot detect clear glass. Inaddition, the delay time and the maximum distance oftransmitting and receiving images are approximately at 0.1s and40m, respectively.