The present invention provides a kind of auxiliary device and user terminal, is suitable for the stimulation of the active state of brain by assigning, and auxiliary improves the spirit aspect of user. Auxiliary device (1) obtains the brain activity data of user comprising: data acquiring section (17) It stimulates assigning unit (18), to the head (H) of user, assigns the electromagnetic stimulation for corresponding to brain activity data And E.E.G storage unit (15), the variation of brain activity data is stored, the auxiliary device is configured to when obtaining brain activity data, assigns the changed electromagnetic stimulation of α waves made in brain activity data.
