Carbon fiber-reinforced polymers are becoming more widely used for repair and strengthening of reinforced concrete bridge members by using two main common methods , externally bonded (EBR) to the tension surface of the member or internally located in a near surface mounted location (NSM).The selection of the efficient method from these methods under fatigue load is uncertain.This report presents the results from a laboratory test of a reinforced concrete beams under monotonic and fatigue loads, flexural strengthened by two strengthened system as EBR (externally bonded ) reinforcement and NSM (Near Surface Mounted) reinforcement, at Luleå University of Technology. The influence of strengthening material properties and the case where the concrete was pre-cracked are investigated and discussed through analysing the failure mechanism, load-deflection, and strain measurements in steel bars and CFRP. This study should improve our understanding the behavior of the strengthened reinforced concrete beam in two main strengthening methods under fatigue loading conditions, and should guide us to identify the advantages and disadvantages of these methods.