Color changing clothes ,based on optical and thermal principle ,is divided into photosensitive discoloration and thermal discoloration. To Photosensitive color,the color of the clothes change  with the sunlight intensity when there is’t sunlight ,it displays a color, and change to another color when in the sunshine. To Thermal discoloration,when the temperature changes , the color changing occurs. For example,when the temprerature is higher than 27 degrees, the clothes dispalys a color, and another color when the temperature is less than 27 degrees. Color Dyes works with graphic design, making color changes can be produced to create the effect of pattern changes. The most outstanding feature of color changing clothes is that it meets young people’s pursuit of individuality and demands for fashions. With the growing market demand of color chaning clothes, it will inevitably be more pouplar with young people.