In today's Internet era, network subculture has a profound impact on the construction of young people's scientific belief. The purpose of this study is to deeply explore the dilemma faced by young people in constructing scientific belief under the background of network subculture, and to propose corresponding reflection and solution strategies. A comprehensive analysis of information flooding, the filter bubble, the impact of superstition and pseudoscience, the challenges of scientific communication, and the issues of authority and expertise reveals how these issues affect young people's belief in and understanding of science. Information flooding is a prominent problem, the Internet is filled with a lot of information, but the authenticity is often difficult to discern. This is exacerbated by the Web filtering bubble, which limits young people's exposure to diverse scientific perspectives and leaves them vulnerable to ideas of limitation. At the same time, the spread of superstition and pseudoscience is also spreading in the Internet subculture, which has a negative impact on young people's belief in science. When it comes to scientific communication, information can be oversimplified or misunderstood, leading young people to doubt the authenticity of science. The issue of authority and professionalism involves the certification and professionalism of online information publishers, which makes it difficult for young people to determine which voices are authoritative and trustworthy. In the face of these dilemmas, this study proposes a series of reflection and solution strategies. First of all, it emphasizes the need to strengthen science education to develop young people's information literacy and critical thinking skills so that they can better discern true scientific information. Secondly, to promote diverse viewpoints and encourage young people to actively seek out information from different perspectives to expand their scientific horizons. In terms of scientific communication, communicators should pay attention to the accuracy and clarity of information to avoid information being misunderstood. In addition, the critical thinking of young people is developed so that they can actively evaluate and question the reliability of information. Finally, society should pay more attention to scientists and experts with real expertise and provide them with a wider range of voice opportunities, so as to improve young people's ability to recognize authoritative voices. Through case analysis and empirical research, this study verifies the feasibility and effectiveness of these strategies in practice. To sum up, this study provides in-depth analysis and strategic suggestions for solving the dilemma of young people's science belief construction from the perspective of network subculture, and has positive significance for promoting the healthy development of young people's science belief.