Abstract:Tongue image collecting is very important part in tongue image analysis. A stable and reliable tongue image collecting system with high acquisition precision will directly influence the accuracy of tongue image analysis and diagnosis. To achieve this objective, a one-piece tongue collecting system with full functionality, simple structure and small size is developed. A light environment through Integral sphere can guarantee the uniform light of the tongue body . And the software through MFC based on windows platform is easy to operate, making the system maintained and upgraded easily. To guarantee the accuracy of tongue color, a new method of manual white balance adjustment is studied, which will be convenient for later color reproduction and tongue image analysis.