As a supplement to the traditional field information collection, a collection method based on small aircraft was presented. The working principle of the four-rotor aircraft was introduced. Collection platform structure contained five parts of the field information was designed. The prototype load was 3.5kg.The endurance time was longer than 20min. An inertial measurement system was also designed. The fusion algorithm weight coefficient K of the system was 12 in the test when roll angle error was less than 0.5°. PID closed loop control was used to achieve hover flight in the height of 3m and the offset error did not exceed 5m. The platform equipped with a GPS receiver Trimble 5700 for the real time data sampling experiments. The error between manual sampling and flight sampling data was 1.4m. It indicated that the platform had the basic capability of the acquisition of farmland location information. 