The present invention relates to a target-aiming drug delivery system for diagnosis and treatment of cancer containing liposome labeled with peptides which specifically targets interleukin-4 receptors, and a manufacturing method thereof. The liposome which contains anticancer drugs labeled with IL4RPep peptides prepared in accordance with the present invention can deliver drugs to cancer cells in which IL-4 receptors are overexpressed by IL4RPep peptides which specifically bind to IL-4 receptors, and the drug delivery can recognize cancer cells specifically by a label. Thus, IL4RPep peptides can increase the effect of drugs only on cancer tissues and at the same time significantly reduce the side effects on normal tissues, which makes possible in vivo(molecular) imaging and early diagnosis of tumors. Therefore, the liposome which contains anticancer drugs labeled with IL4Pep peptides of the present invention can be applied, as the target-aiming drug delivery system, effectively to the diagnosis and treatment of cancers.