The embodiment of the invention relates to a transferring type automatic ink supply system based on flexibly-packaged ink. The transferring type automatic ink supply system based on flexibly-packaged ink comprises an ink storage bucket, a flexible ink package squeezing device, an ink pump, a nitrogen pipeline, an exhaust pipe, an ink supply nozzle, a first movement platform, and an ink stock sensor, wherein a temperature sensor in the ink storage bucket is used for detecting the temperature of ink in the bucket, and a temperature detection signal is generated to control a heating device to heat the ink storage bucket; the flexible ink package squeezing device is arranged above the ink storage bucket, and ink in a flexible ink packaging bag is squeezed out and injected into the ink storage bucket; the ink pump is connected to the bottom of the ink storage bucket and starts according to an ink supply control signal to pump out the ink in the ink storage bucket, and the ink is injected into an ink pool through the ink supply nozzle via an ink outlet pipe; the nitrogen pipeline is connected to an air inlet and used for charging nitrogen into the ink storage bucket; the exhaust pipe is connected with an air outlet and used for exhausting gas in the ink storage bucket; the ink supply nozzle is mounted on the first movement platform; the first movement platform is driven by a driving motor to slide parallel to an ink fountain roller along a transverse guide rail; and the ink stock sensor is used for detecting the liquid level of ink in the ink pool, generating the ink supply control signal and sending the ink supply control signal to the ink pump.