In 1975, American CDC established Vessel Sanitation Program (VSP)to guide the standard operation of food and drinking water of cruise ship industry so as to reduce the infection risks of infectious disease of digestive tract of the passengers and crew members of cruise ships. Upon the implementation of VSP, the number of passengers suffering diarrhea per 10,000 persons was reduced from 29.2 in 1990 to 16.3 in 2000, greatly improving the public sanitary risk prevention and control level of cruise ship industry; at present, VSP has become the public sanitary industrial standard of European and American cruise ship industry and it is implemented by the cruise ship companies ranking the top in the industry, such as Royal Caribbean International, Carnival Cruise Lines and Norwegian Cruise Line.

With the vigorous development of Chinese cruise ship market in the recent several years, Wusongkou International Cruise Ship Port started to operate in 2010 and then became the home port and port of call for dozens of international cruise ships. The berthing cruise ships were nearly 500 and the tourists reached nearly 2.85 million person-times throughout the whole year of 2016; 130,000-168,000t cruise ships under Royal Caribbean International and Carnival Cruise Lines were operated in the home port of Wusongkou International Cruise Ship Wharf. In particular, the Majestic Princess of Carnival Cruise Lines and Norwegian Joy of Norwegian Cruise Lines are the luxurious cruise ships customized for the Chinese market. The cruise ship market with high development speed is in urgent demand for public sanitary risk prevention and control guide. In 2015, Baoshan Entry-Exit Inspection and Quarantine Bureau started to carry out the feasibility study on the international advanced cruise ship sanitary inspection mode introduced. By referring to VSP and combining the features of domestic cruise ship market and applicable laws and regulations, it researched and developed portable cruise ship sanitary inspection assistant App; on the basis of the short berthing time of cruise ships, considerable passengers getting on/off board and multiple sanitary inspection items, it transferred more than 150 inspection items and English technical data containing nearly 10,000 English words into electronic database in virtue of the advanced development technique in the industry to realize the information of cruise ship sanitary inspection in order to reach the world advanced level. The application of the App in Wusongkou International Cruise Ship Wharf has improved the cruise ship sanitary inspection efficiency and sanitary risk defect rate greatly and lays a solid foundation for reducing the berthing cruise ship sanitary risks in Wusongkou International Cruise Ship Wharf, accelerating passenger customs clearance service and improving customs clearance service quality.