A molecule transfer and delivery system includes a loading zone (50) for loading a targeted cargo molecule (30) on a carrier molecule (20) making use of a hybridization nature of nucleotides, and an unloading zone (40) for unloading the targeted cargo molecule from the carrier molecule making use of the strand exchange nature of the nucleotides. Towing nucleotide chains including the first single-stranded nucleotides (21) with the first length are bound to the carrier molecule, and the second single-stranded nucleotides (31) with the second length longer than the first length are bound to the targeted cargo molecule. The third single-stranded nucleotides (41) with the same length as the second single-stranded nucleotides are bound to the unloading zone.