SEPC makes a daily 27-day forecast of solar 10.7cm radio flux. The forecast method is 54 coefficient auto regression with coefficients estimated from observed F10.7 of last 730 days. Currently this model has been incorporated into the Space Environment Operational Prediction System of SEPC, and run automatically daily. The yearly mean relative error of 1-27 day forecast is about 5% during solar minimum, and increases to about 15% during solar maximum.