Since the discovery of superconductivity at 26 K in iron-based oxypnictide LaFeAsO 1 − x F x ,[1] doping at different sites in the corresponding parent compound LnFeAsO (Ln=Lanthanide) with different elements has been extensively attempted to get new super- conductors, including isoelectronic substitution of smaller lanthanide ions for bigger ones leading the Tc in the iron-based superconductors firstly to be higher than 40 K,[2, 3] oxygen deficiency in the 1111 system to give higher transition temperature up to 55 K,[4] and the carriers doping with different types at different sites inducing superconductivity.[5–7] Soon after the discovery of above so called 1111 system with ZrCuSiAs-type structure, AFe 2 As 2 (A=Ca, Sr, Ba, Eu) with ThCr 2 Si 2 -type structure (122 system) were found to superconduct once the carriers are appropriately introduced[8–13] or the pressure was applied.[14, 15] K doping at A site,[8–11] P doping at As site[16] and Co doping at Fe site[12, 13] all lead to superconductors, in which the highest Tc is 38 K in Ba 1 − x K x FeAs.[8] As for 111 system, the investigation on LiFeAs presents superconductivity without any hint on structural or magnetic orders.[17–19] The same situation holds for NaFeAs before we present the high quality data on single crystalline NaFeAs, where three successive transitions corresponding to structural, magnetic and superconducting transitions have been observed in the resistivity and magnetic susceptibility curves[20] and later confirmed by neutron scat- tering and muon-spin rotation results.[21, 22] The neutron scattering results indicate that the spin within ab plane is ferromagnetically aligned along b axis and antiferromagnetically along a axis, while in c directions it is antiferromagnetically coupled. Up to now, there is no reports on the study of magnetic structure in LiFeAs, but Li et al. did the first-principles calculations and predicted the stripe antiferromagnetic ground state with easy axis of mag- netization along the b direction of the magnetic unit cell.[23] Thus, 111 system is believed to be the same as 122 and 1111 systems in their magnetic structures. But if we take into ac- count the position of Na or Li ions with respect to the FeAs block, we see difference between 111 system and 122 or 1111 system. Li or Na takes the position of Fe(2) in the compound of Fe 2 As (PbFCl or Cu2Sb structure) and it is assumed to be possible that Li or Na di- rectly interacts with the 5 neighboring As. The delicate difference in their crystal structures may be one possible origin for their slightly different electronic properties between LiFeAs (NaFeAs) and 1111 or 122 systems. To elucidate this problem, NaFeAs is doped with Co or P to see if the results can provide us some hints on the difference or common features between their properties and other doped 122 or 1111 system and further supply additional 2