The interactive process of at-home self-test, result upload, professional diagnosis and feedback enables users to complete some at-home self-test items that are impossible before, which can save social medical resources and a lot of time & expenses while getting rid of time and space restrictions for some medical diagnosis items. With good expansibility, Ustar nucleic acid self-test platform enables at-home self-tests of influenza A virus/influenza B virus, STD, pet healthcare and food safety, etc. by upgrading OTA and replacing consumables, in addition to the COVID-19 test. Against the background of COVID-19, it collects users' single-point test data by the nucleic acid self-test strategy to avoid crowd gathering caused by a centralized collection of nucleic acids and slack prevention & control.