Evaluation　ecosystem　service　value　(ESV)　is　critical,　as　＇lucid　waters　and　lush　mountains　are　invaluable　assets＇.　To　assess　the　incremental　effects　of　ecological　assets　on　soil　and　water　conservation　in　subtropical　mountains,　we　developed　a　remote-sensing-driven　mountainous　equivalent　factor　(RS-MEF)　method　to　estimate　the　ESV　of　Changting　County,　China.　This　method　is　a　hybrid　of　a　conventional　equivalent　factor　framework　and　remote　sensing　techniques　for　mountains,　achieving　several　advancements,　including　spatial　adjustment　using　vegetation　activity　merged　with　productivity,　improved　spatial　resolution,　and　the　removal　of　topographic　effects.　Using　the　RS-MEF　method,　we　estimated　that　the　ESV　of　Changting　County　was　approximately　CNY　15.80　billion　in　2010　and　CNY　34.83　billion　in　2022.　Specifically,　the　ESV　per　unit　area　of　the　major　soil　erosion　area　(MSEA)　in　the　county　was　less　than　that　of　the　non-major　soil　erosion　area　(n-MSEA);　however,　the　ESV　growth　rate　of　the　MSEA　from　2010　to　2022　was　faster　than　that　of　the　n-MSEA.　Therefore,　the　ESV　gap　between　the　two　areas　was　reduced　from　28.99%　in　2010　to　15.83%　in　2022.　Topographic　gradient　analysis　illustrates　that　areas　with　elevations　of　385　to　658　m　and　steep　slopes　achieved　a　high　ESV,　while　high-elevation　areas　with　gentle　slopes　will　be　a　focus　of　control　in　the　next　phase.　Our　study　demonstrates　that　significant　achievements　have　been　made　in　ecological　restoration　from　an　ESV　perspective,　with　a　notable　reduction　in　low-ESV　areas　in　the　MSEA;　the　insights　gained　into　ESV　growth　and　its　underlying　factors　are　valuable　and　instructive　for　future　soil　and　water　conservation　efforts.　©　2024　by　the　authors.