「不是那種每個人動作整齊劃一的舞蹈，而是一種很複雜的芭蕾，個別的舞者與整個舞群各有自己不一樣的表演，但彼此奇妙的互相強化，構成一個有秩序的整體（Jacobs，1961／吳鄭重，2007:p.66）」─「街道芭蕾」概念探索的正是人與環境中的元素之間的種種互動，如何構成某種有機的秩序，而這樣的秩序又如何帶給人們愉快的街道生活體驗。這樣的概念與「複雜系統」所關注的、個體如何在不同層級的系統之間產生交互作用，由下而上形成某種有機秩序，有異曲同工之處。上述兩者在都市及空間規劃的範疇皆已有相當多的討論並帶來諸多啟示，但它們多從實體空間的都市或社區生活為出發點來論述，鮮少用於討論虛擬社群生活。本文便試圖以街道芭蕾與複雜系統觀點來詮釋虛擬偶像的網路社群發展以及其有機生命力是如何誕生。 首先，在文獻探討部分，本文將探討 Vtuber 為主的虛擬偶像之特性，如何 擁有地方性，以及以街道芭蕾或複雜系統作為此研究觀點的特殊性，與過去相關理論觀點作一比較探索，並提出本研究的分析架構：基於聚集與地理利益的觀點；再者，在研究方法及資料分析部分，本文透過深度訪談法來了解閱聽人在以 Vtuber 為核心的粉絲社群生活中的實踐與互動心理，並與街道芭蕾與複雜系統觀點進行理論之對話，進而提出討論與建議。 

 "It is not a dance in which everyone moves in unison, but a very complex ballet, in which individual dancers and the entire dance group have their own different performances, but they are wonderfully mutually reinforcing each other to form an orderly whole (Jacobs, 1961/Wu, 2007: p. 66)."-- The concept of "street ballet" explores how the interaction between people and the elements of the environment constitutes an organic order, and how this order brings people a pleasant experience of street life. Such a concept is similar to how individuals interact with different levels of systems in complexity system, forming an organic order from the bottom up. Both of the above have been discussed and enlightened in the field of urban and spatial planning, but they are mostly discussed from the urban or community life of physical space, and are rarely used to discuss virtual community life. This paper attempts to explain the development of virtual idols' online communities and how their organic vitality was born from the perspective of street ballet and complexity system. Firstly, in the literature discussion, this paper will explore the characteristics of virtual idols dominated by the Vtuber, how they have locality, and the particularity of street ballet or complexity system used as this research viewpoint, then compare them with relevant theoretical views in the past, and propose the analytical framework of this study: based on the perspective of aggregation and geographical interests. Furthermore, in the research methods and data analysis, this paper uses in-depth interviews to understand the practice and interaction psychology of the listeners in the life of the fans’ community with Vtuber as the core, and conducts theoretical dialogues with street ballet and complexity system perspectives, and then puts forward discussions and suggestions.