There?is?no?unique?style?for?the?research?of?the?marketing?of?the?local?catering?services?in?Chongqing,?which?varies?from?industry?to?industry,?and?product?to?product,?bringing?difficulties?to?profit?increase.?The?result?of?marketing?plays?a?vital?role?for?the?development?of?enterprise.?This?article?holds?that?quality?is?the?basis?of?marketing;?when?the?productivity?is?on?the?increase,?it’s?hard?to?improve?the?quality?of?the?product,?especially?that?of?the?traditional?product,?and?the?improvement?of?marketing?quality?largely?influences?the?buying?practice?of?a?consumer.?With?now?the?marketing?data?in?most?catering?services?being?reflected?on?the?graph,?to?get?high?profit?by?adopting?the?strategy?of?high-quality?marketing?will?be?the?inevitable?road?for?an?enterprise?to?take.?This?article?establishes?the?comparison?model?pre?and?after?the?increase?of?marketing?quality?by?adopting?the?ISO9000?theory?in?quality?system,?and?provides?advices?for?the?quality?increase?in?catering?services?by?means?of?process?refining?and?PDCA.