The present utility model relates to a master-salve wireless doorbell intercom system, comprising an indoor unit and an outdoor unit, wherein the indoor unit comprises a first power management unit, a first microprocessor, a first communication module and a first voice module, with both the first power management unit and the first communication module being electrically connected to the first microprocessor, and the first voice module being electrically connected to the first communication module; and, the outdoor unit comprises a second power management unit, a second microprocessor, a second communication module, a third communication module and a second voice module, with the second communication module and the third communication module being communicatively connected to the first communication module, respectively. The present utility model makes use of the intercom technology.