The invention relates to a water purifier with a self-help external-heating pipe (comprising a water purifier and a heater) control system used for purifying and heating common municipally directly-supplied tap water (water pressure larger than or equal to 0.2MPa), in particular to a water purifier with a self-help external-heating pipe. The water purifier comprises an electromagnetic valve, filters, a control panel, an upper kettle cover, a kettle and a power socket. The electromagnetic valve is provided with a water inlet connected with a tap water pipe through a water inlet pipe and is provided with a water outlet connected with water inlets of the filters through pipelines, and the filters are provided with water outlets corresponding to water inlets of the kettle. The control panel is used for controlling stop of water purifying. The filters are provided with filter bottles, seal caps are capped on the upper portions of the filter bottles, cartridge shells are arranged in the filter bottles, cartridges are arranged in the cartridge shells, the filter bottles are provided with water inlets and outlets, and a self-help plug-and-pull structure is arranged between the water inlets and outlets of the cartridge shells and the water inlets and outlets of the filter bottles.