The development of folk secret religious sects flourished in Ch'ing period. The sects were widely prevalent among the lower strata society, even thought the government depressed them constantly The popularity and the flourishing of the sects, I argue, were closely related to economic factors The economic condition of the sects was inferior to Buddhism and Taoism, because the latter were possessed of religious property and steady income The income of the sects depended on the donation of believers. The leaders of the sects advanced religious theories inclusive of avoiding calamity and pursuing future happiness, and provided a lot of social function to attract popular people to join the sects The leaders utilized some ways and items to receive money from believers, such as respecting for teachers, teaching doctrine, holding rituals, making incantation, curing the disease of patients, assisting funeral In addition they still made other ways to increase the income of the sects Believers joined the sects for two reasons First, they yearned for promises of future wealth to shake off their present poverty. Second, they wished to attained religious positions to recruit new believers in order to increase their own income By the donations of pious believers, the funds accumulated constantly, and the amount of only year was from some to thousands silver Liang (兩), depending on the scale of the sects The income of the sects was not only to improve the living of the leaders, but also to maintain the activities of the sects Therefore, I argue that the economic advantages to leading or joining sects were what attracted so many from the lower strata of society to participate in secret sects so enthusiastically. As a consequence, it was difficult for the government authorities to prohibit the spread of such sects.