<p>Interest in magnetic graphene is steadily increasing, while achieving room temperature ferromagnetism in graphene continues to be a major challenge. Here, we successfully developed room-temperature ferromagnetic graphene with a saturation magnetization of 2.6 emu/g. The fabrication was based on using a cost-effective Joule heating technique and incorporating magnetic impurities into the graphene structure via a bottom-up approach. We explore the possibility of converting both conductive and insulating amorphous carbon materials into magnetic graphene. Raman spectroscopy reveals that the sample undergoes graphitization during the Joule heating process. It is intriguing that the magnetization curves exhibit a magnetization with a reasonable level of coercivity. The simultaneous occurrence of graphitization and magnetization suggests a connection between the emergence of conduction electrons originate from π orbitals and the formation of magnetic order. This magnetic order results from the presence of conduction electrons and the introduction of magnetic impurities into the graphene structure, satisfying Stoner’s criterion. The magnetization of the final product can be adjusted by varying the fraction of magnetic impurities and the type of raw material used. Our results indicate a promising method for producing high-quality magnetic graphene materials.</p>