People with an intellectual disability (ID) have difficulties completing their daily tasks, especially complicated ones. Memory and planning deficiencies can significantly impede cooking activities. Having difficulty remembering where the ingredients are located and organizing steps in a recipe can also be quite a challenge. The DOMUS smart home was built to promote functional autonomy. The smart home aims to assist people in activities that are not performed adequately. It prompts information on a touch screen that interacts with the person. The smart home was evaluated with nine people with an ID. The method consists of a two-phase experimentation. The results of the first phase, which involves working with medical staff to select and define an activity to assist, are presented. The second phase, the evaluation of the device with people with ID, is in progress and the topic of a future paper. We conclude by discussing the generalization of smart homes in promoting autonomy in people with dementia.