The modernization of grassroots governance is an important foundation for promoting the modernization of state governance. Solving the rigid dilemma faced by the current grassroots governance mechanism and activating the “collaborative inertia” of grassroots pluralistic democratic consultative governance up against technology empowerment can stimulate the activity of grassroots governance, improve governance efficiency, and enrich the theoretical connotation of state governance modernization. Based on the case of the “Black Tea Council” in H Street of Hangzhou, this paper analyzes the innovation of theory and technology in the practice process from the perspective of the choice of governance subject and the determination of management mode. It is found that technology is used to enhance residents’ deliberation ability and enthusiasm for participation, dynamically debug the logical strategy of collaborative resolution of contradictions and disputes, and strengthen the overall concept and humanistic thought of “from an entity to entirety”. Moreover, technology can also grasp the “key minority” to focus on problems and avoid technical alienation and formalism, so as to finally realize the orderly and effective solution to grassroots governance problems.