The Standard Model (SM) of particle physics is one of the most successful achievements in modern physics. It provides an elegant theoretical framework to describe the behavior and interactions of the elementary particles, whose predictions agree remarkablely well with nearly all experimental measurements. Despite its extraordinary successes, however, it is known that the SM cannot be the final theory of nature and people are currently trying to seek the new physics beyond the Standard Model (BSM). My current research focus is on phenomenology at high energy colliders, which is a branch of theoretical physics to build bridge between abstract theoretical models and experimental observations. The projects involve both SM and BSM physics.