The present application relates a two-wire communication control device and a multi-purpose device. The two-wire communication control device includes a signal receiving module, a first control module, at least one second control module, a power supply module, a coding module, and a decoding module. The signal receiving module is connected to the first control module, the first control module is connected to the coding module, the coding module is connected to the power supply module, the decoding module is connected to the coding module, the decoding module is further connected to the second control module, the power supply module is connected to a live wire and a neutral wire, the power supply module is further connected the first control module and the second control module, one of the coding module and the decoding module is connected to the live wire, and the other is connected to the neutral wire.