Over the period of two decades of public governance evolution, the public sector researchers focused on the main elements of new public management evolution to new public governance as modern stage of public administration theory and administrative practice. The methodology of public governance consists of various ideas, paradigms, analytical methods, models and constructs. Such collection represents the logic of public governance problem research in the modern public sector changes, reforms, modernization at the beginning of twenty first century. This study on the basis of meta-analysis, theoretic modelling, classification, interpretative method has the task to explore the main reasons, structures and impacts of public governance evolution to the development of public policy decision making, intersectional integration, creation of hybrid form of organization networks, quality of socially oriented governance and implementation of more effective strategic planning role modelling the new constructions of performance management in public sector.