Abstract: First,the microscopic relativity is researched.In very small space-time,the velocity of light should have statistical fluctuates.Very small space-time connects also with high-energy and high-speed.Moreover,in the higher-dimensional reel space a velocity of light should be variable and quantized.From this some possible methods,which modify and develop relativity and quantum theory are discussed.Finally,some new equations of quantum mechanics with potential and interaction are proposed.