Nowadays, social media plays an essential role in people’s life. Compared with heterosexual individuals, social media is more important for lesbian, gay, bisexual, and transgender (LGBT) individuals due to its advantages of anonymity and convenience. Among LGBT individuals, Chinese Lesbians are under greater social pressure due to the influence of traditional Chinese socio-cultural value systems. Building online lesbian communities through social media is one of solutions for helping Chinese lesbians to reduce their stress and protect their rights. However, lesbian social apps have developed notably slowly in a global context. There have been few studies on lesbian apps in the past. The value and utility of lesbian social apps in building an online lesbian community have not been fully explored. This article used "the L-app" (a Chinese lesbian application) as an example and utilized Actor-Network Theory (ANT) to study the values and challenges of the lesbian social app in the establishment of an online community. According to the four foundational stages (problematization, interessement, enrolment, and mobilization) of network construction in ANT, this study discussed the feasibility, values, and challenges of lesbian social apps in building an online lesbian community. Furthermore, this article proposed corresponding potential solutions to these challenges based on ANT. This paper provided support for Chinese Lesbian community constructions in the future.