Mobile information and communication technologies (MICTs) (e.g., enterprise social media, and smart devices) have been adopted to improve employees’ performance. However, the ubiquitous MICTs may result in overload effects that harm individuals’ satisfaction. This paper aims to investigate the overload effects of MICTs use in workplace. A theoretical model that articulates key technology overload factors (information speed load, information amount load, communication overload and interruption overload) and individual coping strategies (social support and job control assistant support) is proposed based on cognitive load theory and coping theory. The model examines their effects on job satisfaction, emphasizing investigation of the mechanism of employees’ cognitive and psychological reactions. The interaction relationships among these overload factors explain the internal expanding mechanisms of individual perceived technology overload level. This study also provides a new perspective to understand the technostress in workplace.