Prior studies on technology acceptance models (TAM) have been widely used to examine mobile commerce (M-commerce). These studies usually have applied the structural equation modelling; however, the method has intrinsic limitations in terms of effectiveness and validity. The purpose of this study is to find the critical success factors influencing consumer adoption decision on M-commerce by integrating TAM and decision-making trial and evaluation laboratory. In order to verify the proposed approach, the Taiwanese are used as illustrative examples. This study finds four critical success factors that influence M-commerce adoption: perceived ease of use, perceived usefulness, value-added and service functionality. In addition, these factors were identified as the cause and effect factors. The results of this study are presented to M-commerce service providers' in facilitating the development of wireless services.