A coating application method for applying coating material to an object to be coated using an applicator in an atmosphere in a gas flow, comprising: a first step of measuring a weight of an object for coating weight measurement; a second step of transferring the object for coating weight measurement from a weight measurement chamber to a coating booth through an opening between said coating booth and said weight measurement chamber, wherein a shutter which is provided on the opening and which can be opened and closed is opened such that said object for coating weight measurement can be transferred; a third step of applying said coating material to the object for coating weight measurement by said applicator in the coating booth before coating application to said object to be coated, wherein said shutter is closed during the application of the coating material; material; and a fourth step of automatically transferring said object for coating weight measurement to which the coating material has been applied to the weight measurement chamber through the opening between said coating booth and said weight measurement chamber, chamber, in which weight measurement chamber at least a portion of a measuring part of a weight measuring device is exposed or disposed, the fourth step including opening the shutter such that said object for coating weight measurement can be transferred to the weight measurement chamber, then closing the shutter after the transfer such that an atmosphere free from a gas flow or an atmosphere of a gas flow which does not affect weight measurement is provided in the weight measurement chamber, measuring the total weight of the object for coating weight measurement to which the coating material has been applied, and determining a weight of the applied coating material based on the measured total weight and the measured weight of the object for coating weight measurement; wherein, if the measured weight of the applied coating material falls within a predetermined range, coating application to said object to be coated is performed by said applicator, and, if the measured weight of the applied coating material falls out of the predetermined range, coating application to said object to be coated is performed by said applicator after correcting a coating condition. a first step of measuring a weight of an object for coating weight measurement; a second step of transferring the object for coating weight measurement from a weight measurement chamber to a coating booth through an opening between said coating booth and said weight measurement chamber, wherein a shutter which is provided on the opening and which can be opened and closed is opened such that said object for coating weight measurement can be transferred; a third step of applying said coating material to the object for coating weight measurement by said applicator in the coating booth before coating application to said object to be coated, wherein said shutter is closed during the application of the coating material; material; and a fourth step of automatically transferring said object for coating weight measurement to which the coating material has been applied to the weight measurement chamber through the opening between said coating booth and said weight measurement chamber, chamber, in which weight measurement chamber at least a portion of a measuring part of a weight measuring device is exposed or disposed, the fourth step including opening the shutter such that said object for coating weight measurement can be transferred to the weight measurement chamber, then closing the shutter after the transfer such that an atmosphere free from a gas flow or an atmosphere of a gas flow which does not affect weight measurement is provided in the weight measurement chamber, measuring the total weight of the object for coating weight measurement to which the coating material has been applied, and determining a weight of the applied coating material based on the measured total weight and the measured weight of the object for coating weight measurement; wherein, if the measured weight of the applied coating material falls within a predetermined range, coating application to said object to be coated is performed by said applicator, and, if the measured weight of the applied coating material falls out of the predetermined range, coating application to said object to be coated is performed by said applicator after correcting a coating condition.