As artificial intelligence (AI) and robotic process automation (RPA) develop rapidly, robotic workforces are playing increasingly prominent roles in enterprises as an emerging human resource force. This development is affecting the psychological state of human employees. Drawing upon social comparison perspective, this research examines how human employees perceive the value of robotic workforces and the human-robot relationship. The study also analyzes how these perceptions jointly influence employee work efficacy. The following two unexplored issues are addressed: First, the study focuses on the interactions between the perceived value of robotic workforces and the perceived human-robot relationships by human employees. Those interactions can be divided into four categories. Second, the study examines the social comparison process in human- robot interaction. This research enriches the meaning of social comparison and analyzes the changes of human employees’ psychological states. A mixed design is developed to empirically test the proposed model and hypotheses.