近年來國人對於個人生理、心理健康的重視程度大幅提昇，而空氣負離子被稱為空氣維生素，有助於人類身體健康及心理健全。然而目前台灣及大陸地區對於空氣負離子的研究尚處於啟蒙階段，對於負離子的特性、研究的趨勢、未來可能的研究主題與方向，仍然十分的模糊。有鑑於此，本研究以文獻回顧與歸納法，進行1998至2009年於中文電子期刊服務網及全國博碩士論文資訊網中共72篇相關論文分析與歸納，以基礎理論、實驗驗證、技術與方法、時空間分佈與變遷、影響時空間分佈因素、生心理效益等六個主題進行討論，目的在於瞭解空氣負離子研究趨勢、研究限制、未來值得探討議題等，作為未來空間規劃相關研究者之依循與參考。研究結果發現台灣及大陸地區進行空氣負離子研究的時間相當短，研究主題集中於濃度差異性比較、植物與水體負離子產生能力分析，其理論基礎尚嫌不足，缺乏理論驗證研究，監測技術、分析方法、模擬工具皆有待加強，而且研究議題可更多元化。本研究建議未來國內進行空氣負離子研究，在造園設計領域中可針對水景及植栽產生負離子能力進行實驗及比較，進行小區域空氣離子擴散模式研發，以及景觀元素配置型態與負離子產生能力關係的驗證。景觀規劃領域可建構負離子長期觀測資料庫、環境負離子時空間變化趨勢分析與比較、發展有助於負離子產生及存活的景觀規劃原則及情境評估方法。戶外遊憩領域則建議針對不同戶外遊憩環境負離子濃度分佈及變化進行差異比較、探究遊憩活動對負離子濃度之影響、分析遊憩環境中負離子分佈與遊憩者身心理效益交互影響關係。本研究結果對於空氣負離子有興趣的研究者而言是重要的入門知識，提出的研究方向可引領造園、景觀、休閒遊憩領域新研究者進入空氣負離子研究領域，後續的研究者更可以此論文為基礎，提出更符合國內空間規劃需求、符合國際研究趨勢的議題、技術或方法，進行深入之探究。

The purpose of this study was to identify current lines of research in negative air ions in the fields of gardening, landscape architecture and outdoor recreation. The methodology was to review 72 papers written by authors in Taiwan and China and published by the Chinese Electronic Periodical Service (CEPS) during 1998-2009. All masters and PhD dissertations listed in the Electronic Thesis and Dissertation System (ETDS) in Taiwan were also reviewed. Six research topics in negative air ions were identified: basic theory, experimental verification, technology, methods, impact factors of spatiotemporal distribution, and psychophysiological benefits. Some studies report that negative air ions can be produced by plants and waterfalls, but further theoretical development and experimentation are needed. We suggest that research in the gardening field should focus on the effects of negative air ions on plant and waterfall patterns and on novel simulation models of distribution, then to study the relationship between landscape layout and negative air ions distribution. Research in landscape planning is needed to obtain long term data for negative air ions under outdoor conditions. Studies should then compare the spatial, temporal and spatial temporal effects of negative air ions on the outdoor environment and develop a simulation model for landscape planning and scenery design. Finally, research in outdoor recreation is needed to compare measurements of negative air ions in different areas. Other research issues include the effects of outdoor activities on the distribution of negative air ions and its psycophysiological benefits at outdoor recreation environment. The findings of such a study would provide essential background information and clarify the best directions for future research in negative air ions in the fields of gardening, landscape planning and outdoor recreation.