This technote summarizes the existing work in searching for νe low-energy excess (eLEE) in MicroBooNE Booster Neutrino Beam (BNB) data stream based on the WireCell event reconstruction paradigm. The charged-current νµ and νe events are selected from the 5.3e19 POT data from the BNB beam and 2.06e20 POT data from Neutrinos at the Main Injector (NuMI) beam. The charged-current νe selection results from the BNB data that are sensitive to the eLEE search are not included. Various comparisons between data and Monte Carlo predictions are performed to validate the overall model and demonstrate the power of the analysis techniques.