Using methodological provision for rational decision-making technology, systems and systems activity approaches, the structure of the innovative activity aimed at updating the effectiveness of the system of public authorities is grounded. Besides, this type of activity is presented as an open system combining the set of internal and external components: the first ones are formed by interacted innovation activities of system-wide, functional and instrumental levels; the second ones include resources, opportunities and favorable preconditions as well as basic types and means of maintenance.