In previous studies, we selected the green LED(light emitting diodes) for suitable wavelength of the light by highercommercial yields and lower ratio of the abnormal fruit body in Lentinula edodes. In this study, we aimed to select efficientirradiation intensity of the green LED. Stronger irradiation intensity of the green LED resulted in more polyphenol content of fruitbody. And Polyphenol content of fluorescent lamp was similar to that of the green LED 20 umol·m-2·s-1.. Ergosterol content of thegreen LED 5 umol·m-2·s-1 was showed higher 2.1 times than that of the fluorescent lamp. In four level of irradiation intensity, 5,10, 15, 20 umol·m-2·s-1 there was no big difference in characteristics of the fruit body. However the yield of fruit body in thegreen LED 5 umol·m-2·s-1 is higher than the others. In addition, The amount of electricity used of the green LED 5 umol·m-2·s-1was reduced 15.9% than that of the fluorescent lamp. In conclusion, we selected 5 umol·m-2·s-1 for suitable irradiation intensity inLentinula edodes with sawdust substrate cultivation.