Ecosystem　health　has　been　a　focal　point　and　research　frontier　of　applied　ecology　in　recent　years,　increasingly　used　in　urban　ecological　studies.　To　quantify　the　effect　of　ecological　improvement　from　eco-planning,　an　ecosystem　health　assessment　method　is　used　in　eco-planning　evaluation　and　decision　support　in　the　urban　eco-planning　research　of　Guangzhou　City　of　China.　Based　on　features　of　an　urban　ecosystem,　five　factors　such　as　vigor,　organizational　structure,　resilience,　ability　to　maintain　ecosystem　service,　and　influence　on　people＇s　health　were　selected　to　develop　the　assessment　indicator　system.　Then,　to　evaluate　the　validity　of　planning　measures,　a　cost-effect　analysis　of　the　different　scenarios　on　eco-planning　was　made,　taking　investment　of　the　planned　projects　as　the　cost　and　ecosystem　health　state　after　implementing　the　scenarios　as　the　effect.　To　establish　priority　of　all　the　proposed　planning　schemes　or　countermeasures,　variation　of　the　ecosystem　health　state　was　evaluated　when　the　investment　of　eco-environmental　construction　projects　changes　by　±10%,　±20%　and　±50%,　respectively.　Thus,　the　order　of　importance　of　eco-environment　construction　projects　to　the　urban　ecosystem　health　state　can　be　worked　out,　providing　a　reference　for　prioritizing　the　implementation　of　such　urban　eco-environmental　projects.　The　study　proved　the　trial　value　of　an　ecosystem　health　evaluation　method　in　urban　eco-planning　research.　©　2007　Higher　Education　Press　and　Springer-Verlag.