The invention relates to a system comprising at least two ground processing devices (1,2). The floor treatment apparatuses (1,2) are used for treating a surface in an automatically controlled fashionbased on defined adjustment parameters (12) of the floor treatment apparatus, wherein each of the floor treatment apparatuses (1,2) features at least one detection device (3,4) for detecting at leastone detection parameter (11) of the floor treatment apparatus and/or of an environment of the floor treatment apparatus. In order to enhance a system of this type in such a way that the floor treatment apparatuses (1,2) advantageously cooperate and support one another, the system features a common database (5) that is assigned to the floor treatment apparatuses (1,2). Detection parameters (12) ofat least two floor treatment apparatuses (1,2) are stored in the database (5) in association with the adjustment parameters (11) of the respective floor treatment apparatus.