Abstract: The service power governance of urban grassroots party organizations is a new governance thinking that effectively copes with the tension between the hierarchical power operation and the element-oriented life autonomy. In light of clarifying the basic essentials of the service power governance of urban grassroots party organizations from three dimensions of interpretation and technology， norm and experience， and form and function， the service authority concept based on historical stipulation and realistic situations and the pursuit of community governance reforms from public nature to common nature may constitute the reasons for action. Urban grassroots party organizations have become the operational basis of service power governance based on the power application of administrative-autonomy and organizational structure superimposition and the cross-border governance ability pointing to more integrated border management. Based on the mechanism of political absorption and governance， enabling-responding， consultation-guidance and leadership-coordination become the specific implementation mechanism of the service power governance of urban grassroots party organizations.

Key words: grassroots party organization; service power governance; community governance; political authority; party ability