The contemporary notion of choreography as a structural system of human movements in diverse contexts becomes radically challenged in the context of digital performance. Digital performance works that do not necessarily have human dancers, but instead present digital images and sounds can hardly be seen as choreographic practices in an orthodox way. In this article, I primarily investigated how the notion of choreography is reframed in the context of digital performance by delving into the entanglement of choreography with a computational system. In creating an human-computer interface, choreographers shed light on how the human subject is perceived, cognized and embodied through the entanglement of its corporeal body and the machine. Then, their choreographic sensibilities substantiated in the interface design process do not constitute embodied knowledge of the human body as a biological organism, but that of the posthuman body as an integrated being of the biological and the mechanical. In this sense, I argue that postchoreography as a mode of choreography for the posthuman necessitates the understanding of how a machine perceives a physical input and acts upon a virtual world.