<p>The accurate photoneutron cross section of the <InlineEquation ID="IEq9"> <EquationSource Format="TEX">\(^{27}\)</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>27</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Al nucleus has a significant impact on resolving differences in existing experimental data and enhancing the precision of nuclear reaction rate calculations for <InlineEquation ID="IEq10"> <EquationSource Format="TEX">\(^{26}\)</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>26</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Al in nuclear astrophysics. The photoneutron cross sections for the <InlineEquation ID="IEq11"> <EquationSource Format="TEX">\(^{27}\)</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>27</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Al(<InlineEquation ID="IEq12"> <EquationSource Format="TEX">\(\gamma\)</EquationSource> <EquationSource Format="MATHML"><math> <mi>γ</mi> </math></EquationSource> </InlineEquation>, n)<InlineEquation ID="IEq13"> <EquationSource Format="TEX">\(^{26}\)</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>26</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Al reaction, within the neutron separation energy range of 13.2<InlineEquation ID="IEq14"> <EquationSource Format="TEX">\(-\)</EquationSource> <EquationSource Format="MATHML"><math> <mo>-</mo> </math></EquationSource> </InlineEquation>21.7&#xa0;MeV, were meticulously measured using a new flat efficiency detector array at the Shanghai Laser-Electron Gamma Source. The uncertainty of the data was controlled to below 4% throughout the process, and inconsistencies between the present data and existing data from different gamma sources, as well as the TENDL-2021 data, are discussed in detail. These discussions provide a valuable reference for addressing discrepancies in the <InlineEquation ID="IEq15"> <EquationSource Format="TEX">\(^{27}\)</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>27</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Al(<InlineEquation ID="IEq16"> <EquationSource Format="TEX">\(\gamma\)</EquationSource> <EquationSource Format="MATHML"><math> <mi>γ</mi> </math></EquationSource> </InlineEquation>, n)<InlineEquation ID="IEq17"> <EquationSource Format="TEX">\(^{26}\)</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>26</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Al cross-section data and improving related theoretical calculations.</p>