  Magnetism and magnetic monopole are classical issues in basic physics.
Conventional magnets are generally composed of rigid materials with shapes and
structures unchangeable which may face challenges sometimes to answer the above
questions. Here, from an alternative other than rigid magnet, we disclosed an
unconventional way to generate endogenous magnetism and then construct magnetic
monopole through tuning liquid metal machine. Through theoretical
interpretation and conceptual experiments, we illustrated that when gallium
base liquid metal in solution rotates under actuation of an external electric
field, it forms an endogenous magnetic field inside which well explains the
phenomenon that two such discrete metal droplets could easily fuse together,
indicating their reciprocal attraction via N and S poles. Further, we conceived
that the self-driving liquid metal motor was also an endogenous magnet owning
the electromagnetic homology. When liquid metal in solution swallowed aluminum
inside, it formed a spin motor and dynamically variable charge distribution
which produced an endogenous magnetic field. This finding explains the
phenomena that there often happened reflection collision and attraction fusion
between running liquid metal motors which were just caused by the dynamic
adjustment of their N and S polarities. Finally, we conceived that such
endogenous magnet could lead to magnetic monopole and four technical routes
were suggested as: 1. Matching the interior flow field of liquid metal
machines; 2. Superposition between external electric effect and magnetic field;
3. Composite construction between magnetic particles and liquid metal motor; 4.
Chemical ways such as via galvanic cell reaction. Overall, the fluidic
endogenous magnet and the promising magnetic monopole it enabled may lead to
unconventional magnetoelectric devices and applications in the near future.
