The invention relates to the field of construction area detection and control and concretely relates to a construction area running state control method and system based on a terrestrial magnetism vehicle detector. The method mainly comprises the steps that a distributed terrestrial magnetism vehicle detector collects the running state data of a construction area vehicle and transmits the data to a server by using a data integrated transmission mode; the server transmits first data to a computer and the first data comprises the running state data; the computer carries out first data analysis processing on the first data and obtains first analysis processing data; the computer generates a control strategy based on a cloud calculating method according to the first analysis processing data; and the computer generates control information according to the first data, the first analysis processing data and the control strategy and sends the control information to a variable information issuing plate. The problems of traffic jam and low pass capability in a present stage construction area and the no generation of a systemtic safety management and control countermeasure are solved.