Two　experimental　methods　were　presented　to　generate　a　series　of　triangular　mesh　models　with　specific　size　and　shape　triangles,　and　a　quantitative　assessment　parameter　was　put　forward　to　estimate　triangle　shape　quality.　Based　on　comparison　of　discrete　curvature　errors　of　mesh　models,　eventually　quantitative　relationship　between　triangle　quality　and　discrete　curvature　was　proclaimed.　Results　show　that　triangle　shape　exerts　far　more　influence　on　discrete　curvature　than　triangle　size　does,　and　if　the　shape　is　well　controlled　and　the　size　is　less　than　half　of　local　mean　curvature　radius,　the　discrete　curvature　error　will　be　under　0.5%.　Methods　proposed　are　proved　to　be　effective　by　examples.