In practice, it is difficult to estimate cognitive functions owing to the location and lack of tools for measurement. Therefore, it is restricted to the use of items on cognitive function that we are able to investigate. Multiple application software can be installed on a tablet-computer. Therefore, it could be a useful tool for assessing cognitive function without depending on the measurement environment. In this review, we examined psychological studies that used a tablet-computer to assess cognitive functions in the workplace. Additionally, we discussed the usability of a tablet-computer as a tool for assessing cognitive function in various environments.