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@Denis Bourgeois and @Aaron Boranian answered my question. Below is just a memorandum of how to use SurfaceProperty:OtherSideCoefficients actually.

Only Name, Constant Temperature Schedule Name and Combined Convective/Radiative Film Coefficient should be input. Combined Convective/Radiative Film Coefficient should be 0. Other fields can be the default values.

SurfaceProperty:OtherSideCoefficients,
    SurfaceProperty_FloorTemp,  !- Name
    0,                       !- Combined Convective/Radiative Film Coefficient {W/m2-K}
    ,                        !- Constant Temperature {C}
    1,                       !- Constant Temperature Coefficient
    ,                        !- External Dry-Bulb Temperature Coefficient
    ,                        !- Ground Temperature Coefficient
    ,                        !- Wind Speed Coefficient
    ,                        !- Zone Air Temperature Coefficient
    ScheduleFile_HourlyFloorSurfaceTemp,  !- Constant Temperature Schedule Name
    No,                      !- Sinusoidal Variation of Constant Temperature Coefficient
    24;                      !- Period of Sinusoidal Variation {hr}

Schedule:File,
    ScheduleFile_HourlyFloorSurfaceTemp,  !- Name
    ,                        !- Schedule Type Limits Name
    C:\Project\XXXXX\ScheduleFile_HourlyFloorSurfaceTemp.csv,  !- File Name
    2,                       !- Column Number
    1,                       !- Rows to Skip at Top
    8760,                    !- Number of Hours of Data
    Comma,                   !- Column Separator
    No,                      !- Interpolate to Timestep
    60;                      !- Minutes per Item

Change Outside Boundary Condition of the relevant surfaces in BuildingSurface:Detailed to OtherSideCoefficients, and input the Name of SurfaceProperty:OtherSideCoefficients to Outside Boundary Condition Object.

BuildingSurface:Detailed,
    2to50F_Office_1_Floor,  !- Name
    FLOOR,                   !- Surface Type
    Interior_Floor,   !- Construction Name
    2to50F_Office_1,  !- Zone Name
    ,                        !- Space Name
    OtherSideCoefficients,   !- Outside Boundary Condition
    SurfaceProperty_FloorTemp,  !- Outside Boundary Condition Object
    NoSun,                   !- Sun Exposure
    NoWind,                  !- Wind Exposure
    autocalculate,           !- View Factor to Ground
    4,                       !- Number of Vertices
    -154.48095703125,        !- Vertex 1 X-coordinate {m}
    -66.984489440917969,     !- Vertex 1 Y-coordinate {m}
    123.80000305175781,      !- Vertex 1 Z-coordinate {m}
    -155.17350769042969,     !- Vertex 2 X-coordinate {m}
    -64.064559936523438,     !- Vertex 2 Y-coordinate {m}
    123.80000305175781,      !- Vertex 2 Z-coordinate {m}
    -150.95506286621094,     !- Vertex 3 X-coordinate {m}
    -63.064018249511719,     !- Vertex 3 Y-coordinate {m}
    123.80000305175781,      !- Vertex 3 Z-coordinate {m}
    -150.26249694824219,     !- Vertex 4 X-coordinate {m}
    -65.983940124511719,     !- Vertex 4 Y-coordinate {m}
    123.80000305175781;      !- Vertex 4 Z-coordinate {m}

EMS is necessary only for overriding Schedule:File during SummerDesignDay and WinterDesignDay.