A bivariable control system that combined GPS and GPRS was designed as the variable rate fertilizer embedded solutions, and the information platform based on ARM and DSP dual-CPU architecture was developed. Based on ARM9 and WinCE support the graphical user interface and touch operation, the host system was able to achieve information input and reflect the real-time operating status of the fertilization and seed production process. Based on DSP/BIOS real-time operating system, the slave system could implement the opening and revolution motor servo control of fertilizing and seeding. The system hardware and software structure, which has good scalability and real-time flexibility, was depicted in detail. The test results showed that the system could achieve fast and accurate fertilizing and seeding precision delivery.