An image processing apparatus includes a storage unit configured to store information about an other image processing apparatus different than the image processing apparatus that operates with the image processing apparatus, an acquiring unit configured to acquire function information indicating a function provided by a first image processing apparatus, and a control unit. In the control unit, in a case that a comparison result of the comparing unit indicates that the first image processing apparatus includes at least one function not provided by the image processing apparatus, information about the first image processing apparatus is stored in the storage unit, and in a case that a comparison result of the comparing unit indicates that the first image processing apparatus doesn't include at least one function not provided by the image processing apparatus, information about the first image processing apparatus is not stored in the storage unit.