Interactive bricklaying combines augmented reality technology with robot fabrication technology, utilizing both human intelligence and robot precision. Humans intuitively complete various differentiated bricklaying designs, while robot systems accurately execute bricklaying tasks. Traditionally, in such workflows, the design and fabrication processes are separated, with a lower level of human-robot interaction. By comparing with traditional interactive workflows through experimental studies, this research explores a higher degree of interactive workflow where design and fabrication alternate. It analyzes the impact, limitations, and potential of human involvement in linear robot fabrication processes. Using this new workflow, the study achieved the design and fabrication of a conical structure without prior design. During construction, the structure was gradually reduced in layers from the bottom up, with the number of bricks reduced and brick positions adjusted through manual observation, successfully controlling the tapering form and achieving closure of the circular brick wall. The new workflow utilizes human judgment to continuously determine the next design based on the current real construction situation, ensuring the rationality of the design and the stability of the construction process.