The present disclosure provides a microfluidic chip, a box device adapted to the microfluidic chip, and a microfluidic device including the microfluidic chip and the box device. The microfluidic chip includes a first container for accommodating a first fluid, a second container for accommodating a second fluid, a delivery channel, a sorting channel and a collector. The delivery channel is shaped such that the first fluid and the second fluid merge at a confluence. The sorting channel includes a first sorting channel and a second sorting channel. The collector includes a first collector and a second collector.