This paper performed a test program on eighteen notched concrete beams flexurally strengthened with carbon fiber (CF) sheet. The objective was to improve the bonding configurations of FRP to concrete interface for achieving optimal flexural strengthening performance. Two types of sheet geometries (conventional CF sheet and new CF strand sheet) and three types of adhesive bonding systems (normal adhesive bonding, ductile adhesive bonding, and a hybrid use of two of them) were applied for these beams. Through combining the CF sheet geometry and adhesive bonding system in different ways, five bonding configurations were formulated as follows: (1) conventional CF sheet + normal adhesive bonding; (2) conventional CF sheet + ductile adhesive bonding; (3) CF strand sheet + normal adhesive bonding; (4) CF strand sheet + ductile adhesive bonding; and (5) CF sheet + hybrid (normal and ductile) adhesive bonding. Efficiencies of these various bonding configurations were compared in terms of the serviceability and ultimate state structural performance of the strengthened beams. The new type of CF strand sheet proved to be superior to conventional CF sheet. In addition, the hybrid adhesive bonding system demonstrated its advantage over normal and ductile adhesive bonding systems. Therefore, it was concluded that an ideal flexural strengthening design has been realized by optimizing the mechanical properties of bonding adhesives, bonding configurations, and CF sheet geometry.