Many　researchers　have　confirmed　a　correlation　between　the　built　environment　and　physical　activity.　However,　most　studies　are　based　on　the　objective　characteristics　of　the　built　environment,　and　seldom　involve　the　residents＇　subjective　perception.　The　purpose　of　this　study　is　to　explore　the　relationship　between　the　subjective　and　objective　characteristics　of　the　built　environment　and　physical　activity　at　the　community　scale.　Data　consists　of　that　collected　from　a　social　survey,　Points　of　Interest　(POI),　the　road　network,　and　land　use　in　Fuzhou,　China.　The　duration　of　moderate-to-vigorous　physical　activity　(MVPA)　within　a　week　is　used　to　represent　the　general　physical　activity　of　residents.　Security　perception　is　introduced　as　an　intermediary　variable.　SPSS　software　is　used　for　factor　analysis　and　Amos　software　for　statistical　analysis.　Structural　equations　are　set　up　to　analyse　the　relationship　between　these　variables.　The　final　results　show　that:　(1)　The　objective　characteristics　of　the　built　environment　have　no　direct　impact　on　the　development　of　leisure　MVPA,　but　it　can　indirectly　affect　leisure　MVPA　through　residents＇　subjective　perception　of　the　built　environment;　(2)　The　subjective　perception　of　residents　has　a　significant　impact　on　the　duration　of　MVPA,　the　subjective　perception　of　humanized　space　has　a　direct　impact　on　the　duration　of　MVPA,　and　destination　accessibility　and　urban　environment　maintenance　has　an　indirect　impact　through　community　public　security　perception;　and　(3)　The　individuals＇　attributes　such　as　gender　and　self-evaluated　socioeconomic　status　have　negative　effects　on　the　duration　of　leisure　MVPA,　and　an　individual＇s　love　of　sports　has　a　positive　effect　on　MVPA.