Hong Kong is one of the cities with the largest number of skyscrapers. In this paper, we study the factors that lead to construction accidents on sites by interviewing the relevant parties. In the second part of the research, we extract the causes of accidents from court case report. Last but not least, we include a single case study from one of the largest construction companies in Hong Kong where robotics, drones, three-dimensional printing, virtual reality, wearable robotics and so on are applied on construction sites. It aims to study whether innovative tools can provide solutions to improve safety performance on sites.