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Among the different states of matter, liquids have particular advantages in terms of easy handling and recycling as the precursors, which has been manifested in various chemosynthetic reactions, but remains underexplored in graphene synthesis. This work reports the direct conversion of liquid organic precursor into versatile 3D graphene materials using rapid laser irradiation under ambient conditions. The liquid precursor allowed easy fabrication of graphene with significant 3D architectures, including powders, patterned composite structures, and substrate-free films. Taking advantages of the high compatibility of liquid precursor with a wide range of dopants, the 3D graphene could be further engineered together with various functional components, especially the high loading (∼15 wt%) and well-dispersed (an average diameter of less than 50 nm) high-entropy alloy nanoparticles. Furthermore, combined with the 3D printing strategy, the rapid construction of graphene with complex and accurate 3D shapes was demonstrated via a selective in-situ laser transforming (SLT) strategy. With the highly structural integrity unachievable by traditional 3D printing methods, the obtained objects showed an electrical conductivity of 4380 S/m and a compressive modulus of 31.8 MPa. The results reported in this work will open up a new way for the fabrication of functional carbon materials with customizable shapes and components This article is protected by copyright. All rights reserved.