Objective To compare the efficiency of the double mosquito net method, human-baited net trap method, and human-baited landing method in monitoring the density of adult Aedes albopictus, and to provide a reference for the monitoring of the density of adult Ae. albopictus and the prevention and control of Aedes-borne diseases including dengue fever. Methods From August to September, 2016, three methods were used to monitor the density of adult Ae. albopictus mosquitoes in three habitats with high adult mosquito density in Taihua town of Yixing, Jiangsu province, China. With the Latin-square experiment design, the habitats and methods were used alternately. Three rounds of experiments were performed. The least significant difference (LSD) test was used for comparison between two groups; an analysis of variance was used for comparison of meteorological data between different habitats, and the LSD test was used for comparison between two groups; Pearson correlation analysis was used to investigate the correlation between adult mosquito density and meteorological data. Results The mean density of adult Ae. albopictus mosquitoes measured by the human-baited landing method was significantly higher than that measured by the double mosquito net method[(30.44±8.70) mosquitoes/person/hour vs (10.67±7.42) mosquitoes/net/hour, LSD-t=6.865, P=0.021] and the human-baited net trap method[(30.44±8.70) mosquitoes/person/hour vs (12.89±2.53) mosquitoes/net/hour, LSD-t=6.093, P=0.026], while there was no significant difference in monitoring efficiency between the double mosquito net method and the human-baited net trap method (LSD-t=-0.772, P=0.521). Average temperature, average relative humidity, and average wind speed were not correlated with the density of Ae. albopictus (r=-0.019, -0.031, and -0.332, P=0.961, 0.938, and 0.383). Conclusion The double mosquito net method has comparable monitoring efficiency to the human-baited net trap method, but both of them are less efficient than the human-baited landing method. The double mosquito net method has a clear advantage in protecting attractors and is still an efficient monitoring method in the epidemic area and during the outbreak of mosquito-borne diseases.