The invention relates to the technical field of a hotel service robot system based on cloud voice communication and emotion perception. The hotel service robot system includes a cloud voice recognition module, a semantic understanding module, a voice playing module, a facial expression recognition module, a face recognition module, a display module, an action recognition module, an emotion recognition module, a check-in/check-out module, a print material module, a payment module, a surveillance video system module, an identity card scanning module and the like. The above modules are integratedin a hotel service robot, the hotel service robot judges whether there is a customer check-in and check-out service by using a face recognition technology, and handles the service by voice communication with a customer, and meanwhile, the hotel service robot has functions of printing of related materials, payment, identity scanning and the like. The hotel service robot judges customer emotion through three aspects of information of human facial expression, voice and action to properly adjust emotional scenes for communication with the customer, and the hotel service robot can call a hotel monitoring system to perform face recognition in order to remind customers whose face images are not collected and recorded to collect and record the face images.