本研究旨在探討軟式網球男子雙打比賽，後衛前四名與後四名得分技術、失分技術的差異，以2009年全國運動會男子前8強雙打賽選手為研究對象，所得資料以t檢定、單因子變異數、雙因子變異數進行分析。得結果如下：
一、得分技術方面：發球（26.14％）、接發球（25.88％）、正手拍（40.16％）、反手拍（11.89％）、正手截擊（10.96％）、正手高壓殺球（4.89％）等技術使用次數有差異（p<.05），為比賽中經常使用之得分技術。
失分技術方面：發球（5.06%）、接發球（26.60%）、正手拍（43.42％）、反手拍（20.31）、正手截擊（14.41）、反手截擊（13.42）等在失分技術中均使用次數有差異（p<.05），為比賽中經常失分之技術。
二、前四名與後四名後衛在8項技術上，發球、接發球、正手拍、反手拍、正手截擊、正手高壓殺球在得分上有顯著的差異（p<.05）。
三、前四名與後四名後衛在接發球、正手拍、反手拍、正手截擊、反手截擊等技術在失分上有顯著的差異（P<.05）。

　　The purpose of this study is exploring whether there is a difference between scoring and losing point in the technological use of men double soft tennis by the first four and last four guards. The subject of the study is the top-eight ranked national athletics meet in 2009. The statistical techniques of t-test, one-way ANOVA and two-way ANOVA were employed. The results are shown below:
1.In aspect of scoring, service (26.14%), receive (25.88%), forehand (40.16%), backhand (11.89%), forehand volley (10.96%) and forehand smash (4.89%) are higher than other technologies in using. It shows that these techniques are often used in competition. In aspect of losing point, service (5.06%), receive (26.60%), forehand (43.42%), backhand (20.31%), forehand volley (14.41%) and backhand volley (13.42%) are used more often than other techniques, and this observation showed that these techniques are related to losing point in competition.
2.In aspect of scoring, a significant difference was seen in service, receive, forehand, backhand, forehand volley, and forehand smash used by the first four and last four guards.
3.In aspect of losing point, a significant difference was seen in receive, forehand, backhand, forehand volley, and backhand volley used by the first four and last four guards.