The traffic accidents always happen at the corner of roads. Because of driving too fast, people can not react in time to protect themselves. Especially when the weather is not good, for instance, the weather phenomenon as the haze, mist, rain and so on. Warning corner mirror applies infrared sensor technology, combines traffic corner mirror with warning light. Not only in sunny days but also in some bad weather, it can discern the traffic situations and alert walkers and drivers to the danger of traffic accidents.