The invention relates to an automated construction site management and support system for a preparation of a construction site during a construction rest period, and for determining a current state of a construction site during a rest period. The system comprises at least one server means (1), storing a general construction database (2) with digital construction plan information, and a mobile support system (5, 5', 5", 7, 7') which can be either a drone or a vehicle or an unmanned vehicle being adapted for automatic movement and positioning on the construction site, and for executing auxiliary preparatory tasks for a construction work package such as tagging construction markings and information (6,9-16) to the construction site, and for executing controlling tasks on the construction site for determining a current state of an object entity of a physical construction component. Sequences of auxiliary preparatory tasks and/or a set of controlling tasks are automatically defined based on the current state of the construction database (2), and, if applicable, a defined outcome for a work package, particularly by optimizing the disposal of available manpower and material reserve.