The technique of integration within ordered product (IWOP) of operator is applied to analyze the Hamiltonian produced in the quantization scheme of the mesosopic LC electric circuit and explore the corresponding quantum squeezing effects when there is a sudden change in electrical capacity, inductance and external current. It turns out that while the sudden change of capacity results in squezzing in the quadrature q, the sudden change of inductance brings out squeezing in another quadrature p, and the nonlinear change of enternal current source reveals number-phase squeezing.