Taking　the　photovoltaic-thermal　hot　water　system　based　on　the　micro　heat　pipe　array　as　the　research　object，the　operation　performance　of　the　system　with/without　consideration　of　user　usage　was　studied　in　detail　by　means　of　mathematical　simulation.　The　results　show　that　considering　user　usage，the　initial　temperature　of　water　tank　is　always　higher　than　40　℃　，but　the　highter　initial　temperature　has　no　obvious　effect　on　the　improvement　of　the　final　temperature，compared　with　the　condition　without　consideration　user　usage，its　average　thermal　efficiency，electrical　and　comprehensive　efficiency　respectively　reduce　by　10.7%-34.7%，0.1%-0.4%　and　11.6%-　35.4%　，especially　in　cloudy　days.　It　is　recommended　to　introduce　double　water　tank　system　or　optimize　user　usage　habit　to　improve　the　performance　of　the　system.　©　2023　Science　Press.　All　rights　reserved.