Abstract: In this article, daily temperature data of 60 stations on the Tibet Plateau during 1961-2007, which is applied by the National Meteorological Information Center of China Meteorological Administration, was used to analyzed the start data's change with altitude and latitude.The results show that, the beginning date of spring and summer is the advance overall, and the beginning date of autumn and winter is delayed, the change of spring and winter is obvious.At high altitude, the beginning date of spring and summer comes late, but the beginning date of autumn and winter behaves in opposite, the lower the altitude, the beginning date of spring and summer is coming sooner, the beginning date of autumn and winter comes too late;at higher altitudes, the more the beginning dates of spring and summer advanced, the more the beginning date of autumn and winter delayed, and the changes of low altitude areas are relatively smaller, so, the beginning date of seasons at high altitude is more sensitive to the local temperature;to the south of 36 ° N, the beginning date of spring pushes back with latitude, to the north of 36 ° N, which is relatively early in spring, summer, autumn, winter.The factors including temperature, altitude and latitude affect the beginning date of the seasons;the beginning date of the seasons is coherent with local temperature.