A food products packaging automatic plant comprising: • at least a first food products conveying line, comprising a plurality of first connection areas; • a plurality of operative units, each comprising: - a movable base, that is able to move at the first connection areas of the first food products conveying line; - processing means, placed on the movable base and connectable to the first conveying line at the first connection areas; - a plurality of sensors; and - wireless communication means; • at least a maintenance station of the operative units; • at least one preparation station of the operative units; and • a control and managing central unit that comprises: wireless communication means, for sending and receiving information to and from the operative units; and an internal memory, in which predetermined information is stored; wherein the control and managing central unit, on the basis of the information sent and received to and from the operative units and of the predetermined information stored in the internal memory is able to command the operative units so that they move from and towards the first food products conveying line and from and towards the operative units maintenance and preparation stations; the packaging automatic plant is characterized in that: a) the processing means of each operative units are arranged to perform a processing on the food products conveyed on the first food products conveying line; b) the processing performed by the processing means comprises filling, capping, sealing the food products conveyed on the first food products conveying line; and c) each processing means is dedicated to perform a single operation. • at least a first food products conveying line, comprising a plurality of first connection areas; • a plurality of operative units, each comprising: - a movable base, that is able to move at the first connection areas of the first food products conveying line; - processing means, placed on the movable base and connectable to the first conveying line at the first connection areas; - a plurality of sensors; and - wireless communication means; - a movable base, that is able to move at the first connection areas of the first food products conveying line; - processing means, placed on the movable base and connectable to the first conveying line at the first connection areas; - a plurality of sensors; and - wireless communication means; • at least a maintenance station of the operative units; • at least one preparation station of the operative units; and • a control and managing central unit that comprises: wireless communication means, for sending and receiving information to and from the operative units; and an internal memory, in which predetermined information is stored; wireless communication means, for sending and receiving information to and from the operative units; and an internal memory, in which predetermined information is stored; a) the processing means of each operative units are arranged to perform a processing on the food products conveyed on the first food products conveying line; b) the processing performed by the processing means comprises filling, capping, sealing the food products conveyed on the first food products conveying line; and c) each processing means is dedicated to perform a single operation.