Metal-Organic frameworks (MOFs) have gained significant attention as precursors for magnetic nanoporous carbon material. However, the preparation of MOF-derived carbon with high specific surface area is very limited. In this work, magnetically recoverable nanoporous carbon materials (Co-Zn-MOF-C) were synthesized using Co/Zn-MOF as the starting precursor. Physicochemical properties of Co-Zn-MOF-C materials were well characterized by Powder X-ray diffraction (PXRD), Scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), Energy dispersive spectrometer (EDS), N2 adsorption/desorption isotherms (BET) and EDS. Co-Zn-MOF-C has a high specific surface area up to 1093.74 m2/g and saturation magnetization of 7.71 emu/g. Besides, the adsorption capacity of methylene blue dye could reach 780 mg/g, the adsorption processes agreed well with the pseudo-second-order kinetic model and Langmuir isotherm model. This paper is about the successful synthesis of nanoporous adsorbent Co-Zn-MOF-C by using Co-Zn-MOF as precursor. The samples retained the original shape of MOFs particles, preserved sheet-like structure. The materials are magnetic which allow the adsorbent for easy separation from aqueous solution with an external magnetic field. The adsorption capacity of methylene blue dye could reach 780 mg/g, and it has a potential application in the adsorption of organic dyes. [ABSTRACT FROM AUTHOR]