A drive waveform determination method includes: a first acquisition step of executing first acquisition processing for acquiring, in a first environment condition which is a condition of an environment in which a liquid ejection head is provided, first information on an ejection characteristic of a liquid when each of a plurality of drive waveform candidates is applied to a drive element; a second acquisition step of executing second acquisition processing for acquiring, in a second environment condition which is a condition of the environment in which the liquid ejection head is provided and is different from the first environment condition, second information on the ejection characteristic when each of the plurality of drive waveform candidates is applied to the drive element; and a waveform determination step of determining a drive waveform based on the first information and the second information.