In　the　context,　an　off-and-towards-equilibrium　(OTE)　strategy　which　can　be　integrated　with　fuzzy　control　theory　and　applied　to　structural　control　is　developed　further　in　this　paper.　It　not　only　has　the　merits　of　free　from　accurate　mathematical　models,　fast　reaction,　small　overshoot,　good　resistance　to　disturbances,　but　also　solves　the　difficult　problem　on　establishment　of　control　rules.　Based　on　this　strategy,　numerical　simulations　are　employed　to　study　the　seismic　response　control　of　a　multi-storey　structure　with　an　active　tendon　system　(ATS)　installed　on　the　first　storey.　The　numerical　example　demonstrates　its　feasibility　by　comparing　the　seismic　responses　of　the　structure　using　the　OTE　strategy　to　those　of　the　structure　using　the　LQR　algorithm.