Computer hosts have radiation, but generally produce less radiation. Computer electromagnetic radiation generally exists, according to current research, close to the computer screen measured at the electromagnetic field strength of 0.9A / m, leaving the computer screen screen for about 5cm, the electromagnetic field amplitude drops very quickly, only up to 0.1A / m. The intensity of electromagnetic radiation generated by the computer is very small, the human body in general can be tolerated, will not have any effect. Note that long-term use of computers, long-term sedentary inactivity, or will have an impact on the body. For example, a long time looking at the computer screen is easy to produce visual fatigue, long-term sedentary, easy shoulder and neck pain.