The COVID-19 pandemic shows the increasing demand of robot to substitute human for conducting a series of tasks in contaminated area. Such task includes logistics, patient care, and disinfection, which can reduce the risk of exposure to the highly contagious and deadly virus. This paper presents the design and verification of a new cost-effective autonomous intelligent indoor disinfection robot for automated disinfection work. It integrates the Hydrogen Peroxide Vaporous (HPV) and SLAM for automated disinfection operation in complex indoor environment. A prototype robot has been fabricated for experimental testing. The effectiveness of the developed robot has been verified in real environment, such as hotel and hospital, by qualified third-party testing agency. The work provides an intelligent disinfection robot dedicated to autonomous indoor disinfection work with high safety and effectiveness.