The invention relates to a system for recovering DMF (dimethylformamide) waste liquor with a pervaporation method and a method. The system comprises a preheater, a reduced-pressure distillation kettle, a reduced-pressure condenser, a distillation still vacuum pump, a distillate storage tank, a feed pump, a heater, a pervaporation membrane separator unit, a permeation component condenser, a permeation liquid storage tank, a permeation side vacuum pump and a product storage tank, wherein the pervaporation membrane separator unit is formed by series connection, parallel connection or series-parallel connection of at least one pervaporation membrane separator; a separating membrane material adopted by the pervaporation membrane separator unit is a CHA zeolite membrane or a T zeolite membrane. With adoption of the system and the method for recovering DMF, the hydrothermal stability of the separating membranes is good, DMF is not decomposed, and the purity is high.