Long-span　bridges　are　the　key　component　of　the　human　transportation　system,　linking　communities　over　vast　obstacles.　To　ensure　the　safe　operation　of　long-span　bridges,　structural　health　monitoring　(SHM)　is　perhaps　the　most　effective　solution.　This　study　takes　a　430m　four-span　continuous　girder　bridge　as　an　example　and　systematically　presents　an　implementation　example　of　the　SHM　system　on　the　bridge　regarding　monitoring　items,　sensor　placement,　and　sensor　parameters.　The　monitoring　data　including　operational　load　and　bridge　response　are　analyzed　and　the　statistical　rules　of　these　monitoring　data　are　presented.　Besides,　the　modal　parameters　of　the　girder　are　tracked　from　long-term　vibration　monitoring　data.　Furthermore,　the　correlations　between　structural　temperature　and　bridge　response　are　analyzed,　and　the　correlation　formulas　between　bridge　modal　frequency,　static　responses,　and　structural　temperature　are　finally　given.　The　analysis　results　reveal　significant　seasonal　variations　in　the　responses　of　the　continuously　monitored　girder　bridge,　offering　valuable　insights　for　data-driven　assessment　and　early　warning　systems　for　bridges.