A combined type accessory for communications connection with a mobile terminal may include a power supply module, a control module and a function module. The control module and the power supply module can be detachably connected. The function module and the control module can be detachably connected. The power supply module can supply power to the control module and the function module, and the mobile terminal can be in communications connection with the control module so as to control the function module. Embodiments of the present invention further provide a combined type accessory system. The combined type accessory system and the combined type accessory can form various accessories through a variety of combinations, provide abundant applications of the mobile terminal, and result in convenience for people's life.