An experimental study was presented on flexural bearing capacity of two damaged reinforced concrete (RC) beam strengthened with one layer carbon-fiber-reinforced-polymer (CFRP) sheets bonded with inorganic adhesive. The beam was subjected to a mid-span point bending test under load control. The flexural strength, ultimate states and load-deflection curve at mid-span of test beam were obtained. The failure mode was that the tensile longitudinal steel bars yield first, then CFRP sheets broke in tension. The plane-section assumption was applicable. The experimental results show that it is feasible to strengthen RC beams with CFRP sheets bonded with the inorganic resin. Practical calculation method of the flexural behavior of damaged RC continuous beams strengthened with the inorganic matrix CFRP sheets is established.