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 the rest period. The system comprises at least one server means, storing a general construction database with digital construction plan information, and a mobile support system 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 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 or a set of controlling tasks are automatically defined based on the current state of the construction database, and, if applicable, a defined outcome for a work package.