This two-part treatise rigorously extends the frameworks of Operational Mathematics and Meta-Operational Mathematics to the domain of tensor algebra and multilinear maps. In Part I, we systematically generalize the notion of iteration count—the number of times an operation is applied—from natural numbers to integers, rationals, reals, and complex numbers, but now for tensor operations such as tensor product, contraction, permutation, and covariant differentiation. We establish a hierarchy of tensor hyperoperations, construct fractional and complex-order tensor iterations via multilinear Schr¨oder and Abel equations, and prove existence and uniqueness theorems for real-order tensor tetration. Fractional tensor calculus and fractional tensor calculus of variations are shown to be special cases of this extended framework, unifying discrete tensor networks with continuous tensor field theories. In Part II, we elevate tensor operations themselves to the status of independent mathematical objects, developing Tensor Meta-Operational Mathematics. We construct a rigorous axiomatic system of ten axioms, and prove that the category of tensor meta-operations forms a Hopf PROP (product and permutation category). An explicit Hopf algebra morphism is established from the space of tensor meta-operations to the Connes–Kreimer renormalization Hopf algebra of Feynman graphs with tensor indices, thereby embedding perturbative quantum field theory and gauge theory into the meta-operational framework. Bornological convergence is introduced to handle infinite tensor operations, including path-ordered exponentials (parallel transport) and infinite tensor network contractions. The path integral is reinterpreted as a trace on the PROP, connecting to topological quantum field theory. All classical tensor invariants (determinant, trace, characteristic polynomial) and special matrix functions are shown to belong to the tensor meta-operational universe. This work unifies discrete hyperoperations on tensors, continuous tensor calculus, and the algebraic combinatorics of tensor networks under a single coherent theory, revealing a profound duality between the mathematics of tensor components and the mathematics of tensor operations.