Protostellar jets are the most intriguing characteristics in the magnetized, accreting young stellar objects. The ejection of jets and accretion outbursts are closely related to the formation of complex organic molecules (COMs) in the class 0/I protostars. However, the launching mechanism of the protostellar jet and its correlation with COMs formation are not constrained observationally. In this presentation, I shall briefly introduce the current theory of jet launching. Then I shall present our recent results on jet/outflow from the high spatial resolution and high sensitivity observations with Atacama Large Millimeter/submillimeter Array (ALMA), which is currently the largest radio interferometry array on Earth. Finally, I shall describe the possible connection of the jet with the accretion burst and formation of complex organic molecules within the disk, which would be the chemical composition of future planets.