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An accurate and efficient event reconstruction is an imperative element in realizing the full scientific capability of a detector and achieving the physics goals. The massive liquid argon time projection chambers (LArTPCs) in current and future neutrino experiments create a need for new ideas and reconstruction approaches for high precision neutrino physics. In this seminar, we briefly introduce various philosophies of LArTPC reconstruction, and focus on the principles and algorithms of the novel Wire-Cell 3D event reconstruction techniques, which are able to select 3D images of neutrino activity with high-efficiency and high-purity. The current status of the Wire-Cell 3D pattern recognition is also presented. The roles that LArTPC reconstruction can perform in the Short-Baseline Neutrino (SBN) Program and the Deep Underground Neutrino Experiment (DUNE) are discussed.