Abstract: Photosynthetic and respiratory rates of different waxberry varieties (“Biqi” and “Dongkui” under low temperature stress (2℃ and 10℃) and high temperature stress (35℃ and 40℃) were determined by using an oxygen electrode. The results showed that net photosynthetic rate of Myrica rubra leaves reduced markedly when compared to control one (25℃) as the temperature stress being severer, while respiratory rate increased accordingly. Neither net photosynthetic rate nor respiratory rate came back to natural level while the Myrica rubra leaves freed from temperature stress. Besides, studies on photosynthetic and respiratory rates under different temperatures (2, 10, 35 and 40℃) of NaHCO3 solution also showed the similar results. It proved that temperature played important role in Photosynthesis of Myrica rubra leaves.