Field investigation method refers to direct incoming customer site investigation, capture the scene situation. It can collect more realistic and reliable one-handed material, high credibility. Through the field investigation of the Yonghui supermarket, you capture the current situation of the cost control of the cold chain logistics of the Yonghui supermarket, timely screening, sorting and analysis of the collected materials to provide rationalization proposals for the cost control of the cold chain logistics of the Yonghui supermarket.