Flight control method and flight control system on basis of complicated low altitudes

The invention discloses a flight control method and a flight control system on the basis of complicated low altitudes. The flight control method includes acquiring environmental information in set threshold ranges around to-be-controlled aircrafts; acquiring flight plans of the to-be-controlled aircrafts; judging whether conflict between the environmental information and the flight plans of the to-be-controlled aircrafts exists or not, and allowing the to-be-controlled aircrafts to fly according to the flight plans if the conflict does not exist; acquiring conflict information of the environmental information and the flight plans if the conflict exists; adjusting the flight plans according to the conflict information to obtain adjusted flight plans and allowing the to-be-controlled aircrafts to fly according to the adjusted flight plans. The environmental information includes information of other aircrafts, weather information and topographic information. The flight plans comprise flight routes, flight height