The invention relates to a dual-
algorithm mode farm machinery field operation area calculating
system and method. The
system comprises a vehicle-mounted terminal device and a
server module. The vehicle-mounted terminal device is internally provided with a GPS module for positioning the position of a farming
machine during an operation driving process, a GPRS module for sending together position data and a time corresponding to each position point to the
server module through a
wireless network and receiving a calculating result of a
server, and a controller for controlling the GPS module and the GPRS module, controlling a display result, and controlling historical data storage and scheduling, wherein the GPS module, the GPRS module and a display are connected with the controller, and the GPRS module communicates with the server through a GPRS
wireless network. The server module is responsible for calculating a related result. According to the invention, the
modes of two algorithms, i.e., a
finite element method and a locus method, are simultaneously utilized, the actual
land area of a farm filed operation area and the area of the farming
machine driving in the operation area are calculated, operation cost for
payment is given according to calculated areas, and at the same time, the result of a driving locus is stored in the form of a picture, so that farming
machine drivers and farmers can know detailed driving situations conveniently.