To improve actual coating efficiency, the present invention has a coating robot (2) provided with a coating unit (100) configured by a plurality of rotary atomizing type electrostatic coating machines (20) horizontally arranged, and a coating control apparatus (12) that controls the coating unit (100) and the coating robot (2). A diameter of each of bells (26) is 50 mm or less. The coating material discharge amount of each rotary atomizing type electrostatic coating machine (20) is 400 cc/min or less. A coating distance (Sd) between each bell (26) and a surface to be coated of a workpiece (W) is controlled between 50 mm to 150 mm. The coating material discharge amounts of the plurality of electrostatic coating machines (20) are controlled for the respective coating machines (20). The control of the coating material discharge amounts includes a pause of coating material discharge.