The invention discloses an automatic generator set start-stop and grid-connection system, which comprises a control terminal. The control terminal is connected with a plurality of local controllers through a signal transmission device. The local controllers are connected with generators in a one-to-one correspondence manner. The control terminal is also connected to a common bus through the signaltransmission device. According to the automatic generator set start-stop and grid-connected system, whether there is a need to connect a new generator into a grid or remove an old generator from thegrid can be automatically judged according to the change of the load of a drilling machine. The system can be automatically switched between working modes according to the load change, so that the generators are ensured to work in the optimal working interval as much as possible, fuel consumption is reduced, and the service lives of the generators are prolonged. The starting sequence can be automatically judged, it is ensured that the same generator will not be frequently used, and the depreciation and maintenance expenditure of equipment in the later period is indirectly reduced.