The invention relates to a lawn mower and a control method of the lawn mower. The control method of the lawn mower comprises the steps that the lawn mower is controlled to run on a lawn, but a mowing signal is not outputted, samples of the lawn are collected, and humidness or water content at the corresponding sampling points is detected; the detected humidness or water content at the sampling points is statistically calculated, when the humidness or the water content of the sampling points exceeding a first predetermined proportion is less than a preset threshold value, the mowing signal is outputted, and the lawn mower is controlled to run and cut grasses within the sampling region; otherwise, the mowing signal is not outputted, the lawn mower is controlled to continue running towards the other regions of the lawn, and samples of other areas of the lawn are collected. Before the mowing of the lawn, the humidness or the water content of the lawn can be checked first, in order to avoid the situation of mowing the lawn when the lawn is still relatively wet, so that the service life of the lawn mower is prolonged and the lawn is protected from being destroyed.