It is proved in this paper that Abel’s and Galois's proofs that the quintic equations have no radical solutions are invalid. Due to Abel’s and Galois's work about two hundred years ago, it was generally accepted that general quintic equations had no radical solutions. However, Tang Jianer etc. recently proves that there are radical solutions for some quintic equations with special forms. The theories of Abel and Galois can not explain these results. On the other hand, Gauss etc. proved the fundamental theorem of algebra. The theorem declared that there were n solutions for the n degree equations, including the radical and non-radical solutions. The theories of Abel and Galois contradicted with the fundamental theorem of algebra. Due to the reasons above, the proofs of Abel and Galois should be re-examined and re-evaluated. The author carefully analyzed the Abel’s original paper and found some serious mistakes. In order to prove that the general solution of algebraic equation he proposed was effective for the cubic equation, Abel took the known solution of cubic equation as a premise to calculate the parameters of his equation. Therefore, Abel’s proof is a logical circular argument and invalid. Besides, Abel confused the variables with the coefficients (constants) of algebraic equations. An expansion with 14 terms was written as 7 terms, 7 terms were missing.We prefer to consider Galois’s theory as a hypothesis rather than a proof. Based on that permutation group had no true normal subgroup, Galois concluded that the quintic equations had no radical solutions, but these two problems had no inevitable logic connection actually. In order to prove the effectiveness of radical extension group of automorphism mapping for the cubic and quartic equations, in the Galois’s theory, some algebraic relations among the roots of equations were used to replace the root itself. This violated the original definition of automorphism mapping group, led to the confusion of concepts and arbitrariness. For the general cubic and quartic algebraic equations, the actual solving processes do not satisfy the tower structure of the Galois’s solvable group. The resolvents of cubic and quartic equations are proved to have no the symmetries of Galois’s soluble group actually. It is invalid to use the solvable group theory to judge whether the higher degreeequation has a radical solution. The conclusion of this paper is that there is only the Sn symmetry for the n degree algebraic equations. (Truncated by viXra Admin to < 400 words)